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Finding the Fourth Proportional to 1,545.66, 2,318.87 and 505.71

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Solution

The fourth proportional to 1,545.66, 2,318.87 and 505.71 is: 758.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.66 : 2,318.87 = 505.71 : x
  2. Step 2: Convert to fraction form
    1,545.66/2,318.87 = 505.71/x
  3. Step 3: Cross multiply
    1,545.66x = 2,318.87 × 505.71
  4. Step 4: Simplify right side
    1,545.66x = 1,172,673.22
  5. Step 5: Solve for x
    x = 1,172,673.22/1,545.66
  6. Step 6: Final answer
    x = 758.69

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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.