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Finding the Fourth Proportional to 951.12, 1,312.18 and 703.02

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Solution

The fourth proportional to 951.12, 1,312.18 and 703.02 is: 969.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.12 : 1,312.18 = 703.02 : x
  2. Step 2: Convert to fraction form
    951.12/1,312.18 = 703.02/x
  3. Step 3: Cross multiply
    951.12x = 1,312.18 × 703.02
  4. Step 4: Simplify right side
    951.12x = 922,488.78
  5. Step 5: Solve for x
    x = 922,488.78/951.12
  6. Step 6: Final answer
    x = 969.90

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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.