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Finding the Fourth Proportional to 951.12, 1,312.34 and 558.14

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Solution

The fourth proportional to 951.12, 1,312.34 and 558.14 is: 770.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.12 : 1,312.34 = 558.14 : x
  2. Step 2: Convert to fraction form
    951.12/1,312.34 = 558.14/x
  3. Step 3: Cross multiply
    951.12x = 1,312.34 × 558.14
  4. Step 4: Simplify right side
    951.12x = 732,460.10
  5. Step 5: Solve for x
    x = 732,460.10/951.12
  6. Step 6: Final answer
    x = 770.10

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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.