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Finding the Fourth Proportional to 1,115.11, 1,672.76 and 465.90

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Solution

The fourth proportional to 1,115.11, 1,672.76 and 465.90 is: 698.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.11 : 1,672.76 = 465.90 : x
  2. Step 2: Convert to fraction form
    1,115.11/1,672.76 = 465.90/x
  3. Step 3: Cross multiply
    1,115.11x = 1,672.76 × 465.90
  4. Step 4: Simplify right side
    1,115.11x = 779,338.88
  5. Step 5: Solve for x
    x = 779,338.88/1,115.11
  6. Step 6: Final answer
    x = 698.89

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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.