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Finding the Fourth Proportional to 1,711.76, 2,565.76 and 671.57

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Solution

The fourth proportional to 1,711.76, 2,565.76 and 671.57 is: 1,006.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,711.76 : 2,565.76 = 671.57 : x
  2. Step 2: Convert to fraction form
    1,711.76/2,565.76 = 671.57/x
  3. Step 3: Cross multiply
    1,711.76x = 2,565.76 × 671.57
  4. Step 4: Simplify right side
    1,711.76x = 1,723,083.82
  5. Step 5: Solve for x
    x = 1,723,083.82/1,711.76
  6. Step 6: Final answer
    x = 1,006.61

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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.