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Finding the Fourth Proportional to 528,385.97, 729,176.80 and 310,536.17

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Solution

The fourth proportional to 528,385.97, 729,176.80 and 310,536.17 is: 428,542.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,385.97 : 729,176.80 = 310,536.17 : x
  2. Step 2: Convert to fraction form
    528,385.97/729,176.80 = 310,536.17/x
  3. Step 3: Cross multiply
    528,385.97x = 729,176.80 × 310,536.17
  4. Step 4: Simplify right side
    528,385.97x = 226,435,770,724.86
  5. Step 5: Solve for x
    x = 226,435,770,724.86/528,385.97
  6. Step 6: Final answer
    x = 428,542.36

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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.