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Finding the Fourth Proportional to 610,781.35, 916,470.11 and 432,015.36

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Solution

The fourth proportional to 610,781.35, 916,470.11 and 432,015.36 is: 648,233.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,781.35 : 916,470.11 = 432,015.36 : x
  2. Step 2: Convert to fraction form
    610,781.35/916,470.11 = 432,015.36/x
  3. Step 3: Cross multiply
    610,781.35x = 916,470.11 × 432,015.36
  4. Step 4: Simplify right side
    610,781.35x = 395,929,164,500.89
  5. Step 5: Solve for x
    x = 395,929,164,500.89/610,781.35
  6. Step 6: Final answer
    x = 648,233.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.