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Finding the Fourth Proportional to 1,538.25, 2,308.05 and 807.66

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Solution

The fourth proportional to 1,538.25, 2,308.05 and 807.66 is: 1,211.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.25 : 2,308.05 = 807.66 : x
  2. Step 2: Convert to fraction form
    1,538.25/2,308.05 = 807.66/x
  3. Step 3: Cross multiply
    1,538.25x = 2,308.05 × 807.66
  4. Step 4: Simplify right side
    1,538.25x = 1,864,115.91
  5. Step 5: Solve for x
    x = 1,864,115.91/1,538.25
  6. Step 6: Final answer
    x = 1,211.84

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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.