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Finding the Fourth Proportional to 543,418.72, 749,920.55 and 339,588.08

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Solution

The fourth proportional to 543,418.72, 749,920.55 and 339,588.08 is: 468,633.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,418.72 : 749,920.55 = 339,588.08 : x
  2. Step 2: Convert to fraction form
    543,418.72/749,920.55 = 339,588.08/x
  3. Step 3: Cross multiply
    543,418.72x = 749,920.55 × 339,588.08
  4. Step 4: Simplify right side
    543,418.72x = 254,664,079,727.04
  5. Step 5: Solve for x
    x = 254,664,079,727.04/543,418.72
  6. Step 6: Final answer
    x = 468,633.25

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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.