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Finding the Fourth Proportional to 316,300.80, 474,626.32 and 129,443.52

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Solution

The fourth proportional to 316,300.80, 474,626.32 and 129,443.52 is: 194,236.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,300.80 : 474,626.32 = 129,443.52 : x
  2. Step 2: Convert to fraction form
    316,300.80/474,626.32 = 129,443.52/x
  3. Step 3: Cross multiply
    316,300.80x = 474,626.32 × 129,443.52
  4. Step 4: Simplify right side
    316,300.80x = 61,437,301,545.45
  5. Step 5: Solve for x
    x = 61,437,301,545.45/316,300.80
  6. Step 6: Final answer
    x = 194,236.95

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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.