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Finding the Fourth Proportional to 942.29, 1,411.57 and 616.67

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Solution

The fourth proportional to 942.29, 1,411.57 and 616.67 is: 923.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.29 : 1,411.57 = 616.67 : x
  2. Step 2: Convert to fraction form
    942.29/1,411.57 = 616.67/x
  3. Step 3: Cross multiply
    942.29x = 1,411.57 × 616.67
  4. Step 4: Simplify right side
    942.29x = 870,472.87
  5. Step 5: Solve for x
    x = 870,472.87/942.29
  6. Step 6: Final answer
    x = 923.78

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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.