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Finding the Fourth Proportional to 812,002.80, 1,217,485.80 and 338,876.40

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Solution

The fourth proportional to 812,002.80, 1,217,485.80 and 338,876.40 is: 508,098.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,002.80 : 1,217,485.80 = 338,876.40 : x
  2. Step 2: Convert to fraction form
    812,002.80/1,217,485.80 = 338,876.40/x
  3. Step 3: Cross multiply
    812,002.80x = 1,217,485.80 × 338,876.40
  4. Step 4: Simplify right side
    812,002.80x = 412,577,204,955.12
  5. Step 5: Solve for x
    x = 412,577,204,955.12/812,002.80
  6. Step 6: Final answer
    x = 508,098.25

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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.