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Finding the Fourth Proportional to 309,306.80, 426,878.92 and 173,377.52

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Solution

The fourth proportional to 309,306.80, 426,878.92 and 173,377.52 is: 239,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,306.80 : 426,878.92 = 173,377.52 : x
  2. Step 2: Convert to fraction form
    309,306.80/426,878.92 = 173,377.52/x
  3. Step 3: Cross multiply
    309,306.80x = 426,878.92 × 173,377.52
  4. Step 4: Simplify right side
    309,306.80x = 74,011,208,489.88
  5. Step 5: Solve for x
    x = 74,011,208,489.88/309,306.80
  6. Step 6: Final answer
    x = 239,280.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.