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Finding the Fourth Proportional to 1,545.92, 2,319.78 and 572.70

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Solution

The fourth proportional to 1,545.92, 2,319.78 and 572.70 is: 859.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.92 : 2,319.78 = 572.70 : x
  2. Step 2: Convert to fraction form
    1,545.92/2,319.78 = 572.70/x
  3. Step 3: Cross multiply
    1,545.92x = 2,319.78 × 572.70
  4. Step 4: Simplify right side
    1,545.92x = 1,328,538.01
  5. Step 5: Solve for x
    x = 1,328,538.01/1,545.92
  6. Step 6: Final answer
    x = 859.38

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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.