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Finding the Fourth Proportional to 485,080.40, 726,929.40 and 357,726.80

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Solution

The fourth proportional to 485,080.40, 726,929.40 and 357,726.80 is: 536,080.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,080.40 : 726,929.40 = 357,726.80 : x
  2. Step 2: Convert to fraction form
    485,080.40/726,929.40 = 357,726.80/x
  3. Step 3: Cross multiply
    485,080.40x = 726,929.40 × 357,726.80
  4. Step 4: Simplify right side
    485,080.40x = 260,042,128,087.92
  5. Step 5: Solve for x
    x = 260,042,128,087.92/485,080.40
  6. Step 6: Final answer
    x = 536,080.47

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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.