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Finding the Fourth Proportional to 515,448.80, 772,246.56 and 485,062.64

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Solution

The fourth proportional to 515,448.80, 772,246.56 and 485,062.64 is: 726,721.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,448.80 : 772,246.56 = 485,062.64 : x
  2. Step 2: Convert to fraction form
    515,448.80/772,246.56 = 485,062.64/x
  3. Step 3: Cross multiply
    515,448.80x = 772,246.56 × 485,062.64
  4. Step 4: Simplify right side
    515,448.80x = 374,587,955,124.52
  5. Step 5: Solve for x
    x = 374,587,955,124.52/515,448.80
  6. Step 6: Final answer
    x = 726,721.95

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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.