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Finding the Fourth Proportional to 528,443.25, 729,249.24 and 286,725.22

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Solution

The fourth proportional to 528,443.25, 729,249.24 and 286,725.22 is: 395,679.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,443.25 : 729,249.24 = 286,725.22 : x
  2. Step 2: Convert to fraction form
    528,443.25/729,249.24 = 286,725.22/x
  3. Step 3: Cross multiply
    528,443.25x = 729,249.24 × 286,725.22
  4. Step 4: Simplify right side
    528,443.25x = 209,094,152,127.96
  5. Step 5: Solve for x
    x = 209,094,152,127.96/528,443.25
  6. Step 6: Final answer
    x = 395,679.49

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Double scale
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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.