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Finding the Fourth Proportional to 515,814.40, 773,721.60 and 410,060.80

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Solution

The fourth proportional to 515,814.40, 773,721.60 and 410,060.80 is: 615,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,814.40 : 773,721.60 = 410,060.80 : x
  2. Step 2: Convert to fraction form
    515,814.40/773,721.60 = 410,060.80/x
  3. Step 3: Cross multiply
    515,814.40x = 773,721.60 × 410,060.80
  4. Step 4: Simplify right side
    515,814.40x = 317,272,898,273.28
  5. Step 5: Solve for x
    x = 317,272,898,273.28/515,814.40
  6. Step 6: Final answer
    x = 615,091.20

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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.