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Finding the Fourth Proportional to 1,145.85, 1,718.20 and 560.90

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Solution

The fourth proportional to 1,145.85, 1,718.20 and 560.90 is: 841.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.85 : 1,718.20 = 560.90 : x
  2. Step 2: Convert to fraction form
    1,145.85/1,718.20 = 560.90/x
  3. Step 3: Cross multiply
    1,145.85x = 1,718.20 × 560.90
  4. Step 4: Simplify right side
    1,145.85x = 963,738.38
  5. Step 5: Solve for x
    x = 963,738.38/1,145.85
  6. Step 6: Final answer
    x = 841.07

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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.