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Finding the Fourth Proportional to 547,943.62, 756,185.55 and 306,226.19

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Solution

The fourth proportional to 547,943.62, 756,185.55 and 306,226.19 is: 422,605.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,943.62 : 756,185.55 = 306,226.19 : x
  2. Step 2: Convert to fraction form
    547,943.62/756,185.55 = 306,226.19/x
  3. Step 3: Cross multiply
    547,943.62x = 756,185.55 × 306,226.19
  4. Step 4: Simplify right side
    547,943.62x = 231,563,820,675.12
  5. Step 5: Solve for x
    x = 231,563,820,675.12/547,943.62
  6. Step 6: Final answer
    x = 422,605.19

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Half scale
Find fourth proportional to 1,095,887.25, 1,512,371.11 and 612,452.38
Double scale
Find fourth proportional to 547,944.62, 756,186.93 and 306,227.19
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.