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Finding the Fourth Proportional to 485,318.12, 728,080.86 and 169,785.32

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Solution

The fourth proportional to 485,318.12, 728,080.86 and 169,785.32 is: 254,714.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,318.12 : 728,080.86 = 169,785.32 : x
  2. Step 2: Convert to fraction form
    485,318.12/728,080.86 = 169,785.32/x
  3. Step 3: Cross multiply
    485,318.12x = 728,080.86 × 169,785.32
  4. Step 4: Simplify right side
    485,318.12x = 123,617,441,800.98
  5. Step 5: Solve for x
    x = 123,617,441,800.98/485,318.12
  6. Step 6: Final answer
    x = 254,714.25

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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.