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Finding the Fourth Proportional to 951.78, 1,313.79 and 558.66

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Solution

The fourth proportional to 951.78, 1,313.79 and 558.66 is: 771.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.78 : 1,313.79 = 558.66 : x
  2. Step 2: Convert to fraction form
    951.78/1,313.79 = 558.66/x
  3. Step 3: Cross multiply
    951.78x = 1,313.79 × 558.66
  4. Step 4: Simplify right side
    951.78x = 733,961.92
  5. Step 5: Solve for x
    x = 733,961.92/951.78
  6. Step 6: Final answer
    x = 771.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.