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Finding the Fourth Proportional to 1,545.61, 2,318.91 and 571.79

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Solution

The fourth proportional to 1,545.61, 2,318.91 and 571.79 is: 857.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.61 : 2,318.91 = 571.79 : x
  2. Step 2: Convert to fraction form
    1,545.61/2,318.91 = 571.79/x
  3. Step 3: Cross multiply
    1,545.61x = 2,318.91 × 571.79
  4. Step 4: Simplify right side
    1,545.61x = 1,325,917.95
  5. Step 5: Solve for x
    x = 1,325,917.95/1,545.61
  6. Step 6: Final answer
    x = 857.86

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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.