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Finding the Fourth Proportional to 338,003.20, 506,978.40 and 88,678.72

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Solution

The fourth proportional to 338,003.20, 506,978.40 and 88,678.72 is: 133,011.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,003.20 : 506,978.40 = 88,678.72 : x
  2. Step 2: Convert to fraction form
    338,003.20/506,978.40 = 88,678.72/x
  3. Step 3: Cross multiply
    338,003.20x = 506,978.40 × 88,678.72
  4. Step 4: Simplify right side
    338,003.20x = 44,958,195,579.65
  5. Step 5: Solve for x
    x = 44,958,195,579.65/338,003.20
  6. Step 6: Final answer
    x = 133,011.15

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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.