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Finding the Fourth Proportional to 485,470.12, 728,288.58 and 148,502.68

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Solution

The fourth proportional to 485,470.12, 728,288.58 and 148,502.68 is: 222,779.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,470.12 : 728,288.58 = 148,502.68 : x
  2. Step 2: Convert to fraction form
    485,470.12/728,288.58 = 148,502.68/x
  3. Step 3: Cross multiply
    485,470.12x = 728,288.58 × 148,502.68
  4. Step 4: Simplify right side
    485,470.12x = 108,152,805,943.39
  5. Step 5: Solve for x
    x = 108,152,805,943.39/485,470.12
  6. Step 6: Final answer
    x = 222,779.53

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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.