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Finding the Fourth Proportional to 942.72, 1,411.18 and 571.54

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Solution

The fourth proportional to 942.72, 1,411.18 and 571.54 is: 855.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.72 : 1,411.18 = 571.54 : x
  2. Step 2: Convert to fraction form
    942.72/1,411.18 = 571.54/x
  3. Step 3: Cross multiply
    942.72x = 1,411.18 × 571.54
  4. Step 4: Simplify right side
    942.72x = 806,545.82
  5. Step 5: Solve for x
    x = 806,545.82/942.72
  6. Step 6: Final answer
    x = 855.55

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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.