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Finding the Fourth Proportional to 485,276.80, 726,187.20 and 307,868.80

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Solution

The fourth proportional to 485,276.80, 726,187.20 and 307,868.80 is: 460,706.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,276.80 : 726,187.20 = 307,868.80 : x
  2. Step 2: Convert to fraction form
    485,276.80/726,187.20 = 307,868.80/x
  3. Step 3: Cross multiply
    485,276.80x = 726,187.20 × 307,868.80
  4. Step 4: Simplify right side
    485,276.80x = 223,570,381,839.36
  5. Step 5: Solve for x
    x = 223,570,381,839.36/485,276.80
  6. Step 6: Final answer
    x = 460,706.92

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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.