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Finding the Fourth Proportional to 485,607.68, 728,499.16 and 148,642.24

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Solution

The fourth proportional to 485,607.68, 728,499.16 and 148,642.24 is: 222,990.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,607.68 : 728,499.16 = 148,642.24 : x
  2. Step 2: Convert to fraction form
    485,607.68/728,499.16 = 148,642.24/x
  3. Step 3: Cross multiply
    485,607.68x = 728,499.16 × 148,642.24
  4. Step 4: Simplify right side
    485,607.68x = 108,285,746,980.52
  5. Step 5: Solve for x
    x = 108,285,746,980.52/485,607.68
  6. Step 6: Final answer
    x = 222,990.19

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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.