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Finding the Fourth Proportional to 1,145.87, 1,718.49 and 560.57

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Solution

The fourth proportional to 1,145.87, 1,718.49 and 560.57 is: 840.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.87 : 1,718.49 = 560.57 : x
  2. Step 2: Convert to fraction form
    1,145.87/1,718.49 = 560.57/x
  3. Step 3: Cross multiply
    1,145.87x = 1,718.49 × 560.57
  4. Step 4: Simplify right side
    1,145.87x = 963,333.94
  5. Step 5: Solve for x
    x = 963,333.94/1,145.87
  6. Step 6: Final answer
    x = 840.70

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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.