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Finding the Fourth Proportional to 518,605.60, 777,908.40 and 487,112.80

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Solution

The fourth proportional to 518,605.60, 777,908.40 and 487,112.80 is: 730,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,605.60 : 777,908.40 = 487,112.80 : x
  2. Step 2: Convert to fraction form
    518,605.60/777,908.40 = 487,112.80/x
  3. Step 3: Cross multiply
    518,605.60x = 777,908.40 × 487,112.80
  4. Step 4: Simplify right side
    518,605.60x = 378,929,138,867.52
  5. Step 5: Solve for x
    x = 378,929,138,867.52/518,605.60
  6. Step 6: Final answer
    x = 730,669.20

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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.