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Finding the Fourth Proportional to 1,126.32, 1,553.76 and 684.24

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Solution

The fourth proportional to 1,126.32, 1,553.76 and 684.24 is: 943.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.32 : 1,553.76 = 684.24 : x
  2. Step 2: Convert to fraction form
    1,126.32/1,553.76 = 684.24/x
  3. Step 3: Cross multiply
    1,126.32x = 1,553.76 × 684.24
  4. Step 4: Simplify right side
    1,126.32x = 1,063,144.74
  5. Step 5: Solve for x
    x = 1,063,144.74/1,126.32
  6. Step 6: Final answer
    x = 943.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.