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Finding the Fourth Proportional to 951.05, 1,312.31 and 558.20

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Solution

The fourth proportional to 951.05, 1,312.31 and 558.20 is: 770.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.05 : 1,312.31 = 558.20 : x
  2. Step 2: Convert to fraction form
    951.05/1,312.31 = 558.20/x
  3. Step 3: Cross multiply
    951.05x = 1,312.31 × 558.20
  4. Step 4: Simplify right side
    951.05x = 732,531.44
  5. Step 5: Solve for x
    x = 732,531.44/951.05
  6. Step 6: Final answer
    x = 770.23

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1.5x scale

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.