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Finding the Fourth Proportional to 485,250.80, 726,148.20 and 307,842.80

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Solution

The fourth proportional to 485,250.80, 726,148.20 and 307,842.80 is: 460,667.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,250.80 : 726,148.20 = 307,842.80 : x
  2. Step 2: Convert to fraction form
    485,250.80/726,148.20 = 307,842.80/x
  3. Step 3: Cross multiply
    485,250.80x = 726,148.20 × 307,842.80
  4. Step 4: Simplify right side
    485,250.80x = 223,539,495,102.96
  5. Step 5: Solve for x
    x = 223,539,495,102.96/485,250.80
  6. Step 6: Final answer
    x = 460,667.96

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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.