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Finding the Fourth Proportional to 1,545.85, 2,319.66 and 656.31

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Solution

The fourth proportional to 1,545.85, 2,319.66 and 656.31 is: 984.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.85 : 2,319.66 = 656.31 : x
  2. Step 2: Convert to fraction form
    1,545.85/2,319.66 = 656.31/x
  3. Step 3: Cross multiply
    1,545.85x = 2,319.66 × 656.31
  4. Step 4: Simplify right side
    1,545.85x = 1,522,424.75
  5. Step 5: Solve for x
    x = 1,522,424.75/1,545.85
  6. Step 6: Final answer
    x = 984.85

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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.