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Finding the Fourth Proportional to 1,002.28, 1,383.18 and 560.21

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Solution

The fourth proportional to 1,002.28, 1,383.18 and 560.21 is: 773.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.28 : 1,383.18 = 560.21 : x
  2. Step 2: Convert to fraction form
    1,002.28/1,383.18 = 560.21/x
  3. Step 3: Cross multiply
    1,002.28x = 1,383.18 × 560.21
  4. Step 4: Simplify right side
    1,002.28x = 774,874.76
  5. Step 5: Solve for x
    x = 774,874.76/1,002.28
  6. Step 6: Final answer
    x = 773.11

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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.