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Finding the Fourth Proportional to 1,126.62, 1,690.11 and 477.36

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Solution

The fourth proportional to 1,126.62, 1,690.11 and 477.36 is: 716.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.62 : 1,690.11 = 477.36 : x
  2. Step 2: Convert to fraction form
    1,126.62/1,690.11 = 477.36/x
  3. Step 3: Cross multiply
    1,126.62x = 1,690.11 × 477.36
  4. Step 4: Simplify right side
    1,126.62x = 806,790.91
  5. Step 5: Solve for x
    x = 806,790.91/1,126.62
  6. Step 6: Final answer
    x = 716.12

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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.