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Finding the Fourth Proportional to 1,126.81, 1,687.95 and 562.24

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Solution

The fourth proportional to 1,126.81, 1,687.95 and 562.24 is: 842.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.81 : 1,687.95 = 562.24 : x
  2. Step 2: Convert to fraction form
    1,126.81/1,687.95 = 562.24/x
  3. Step 3: Cross multiply
    1,126.81x = 1,687.95 × 562.24
  4. Step 4: Simplify right side
    1,126.81x = 949,035.12
  5. Step 5: Solve for x
    x = 949,035.12/1,126.81
  6. Step 6: Final answer
    x = 842.23

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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.