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Finding the Fourth Proportional to 418,980.91, 628,472.65 and 103,437.85

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Solution

The fourth proportional to 418,980.91, 628,472.65 and 103,437.85 is: 155,157.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,980.91 : 628,472.65 = 103,437.85 : x
  2. Step 2: Convert to fraction form
    418,980.91/628,472.65 = 103,437.85/x
  3. Step 3: Cross multiply
    418,980.91x = 628,472.65 × 103,437.85
  4. Step 4: Simplify right side
    418,980.91x = 65,007,856,557.44
  5. Step 5: Solve for x
    x = 65,007,856,557.44/418,980.91
  6. Step 6: Final answer
    x = 155,157.09

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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.