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Finding the Fourth Proportional to 951.57, 1,312.88 and 558.72

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Solution

The fourth proportional to 951.57, 1,312.88 and 558.72 is: 770.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.57 : 1,312.88 = 558.72 : x
  2. Step 2: Convert to fraction form
    951.57/1,312.88 = 558.72/x
  3. Step 3: Cross multiply
    951.57x = 1,312.88 × 558.72
  4. Step 4: Simplify right side
    951.57x = 733,529.52
  5. Step 5: Solve for x
    x = 733,529.52/951.57
  6. Step 6: Final answer
    x = 770.86

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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.