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Finding the Fourth Proportional to 528,841.89, 729,781.92 and 287,119.35

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Solution

The fourth proportional to 528,841.89, 729,781.92 and 287,119.35 is: 396,213.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,841.89 : 729,781.92 = 287,119.35 : x
  2. Step 2: Convert to fraction form
    528,841.89/729,781.92 = 287,119.35/x
  3. Step 3: Cross multiply
    528,841.89x = 729,781.92 × 287,119.35
  4. Step 4: Simplify right side
    528,841.89x = 209,534,510,512.15
  5. Step 5: Solve for x
    x = 209,534,510,512.15/528,841.89
  6. Step 6: Final answer
    x = 396,213.91

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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.