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Finding the Fourth Proportional to 951.71, 1,312.49 and 620.02

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Solution

The fourth proportional to 951.71, 1,312.49 and 620.02 is: 855.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.71 : 1,312.49 = 620.02 : x
  2. Step 2: Convert to fraction form
    951.71/1,312.49 = 620.02/x
  3. Step 3: Cross multiply
    951.71x = 1,312.49 × 620.02
  4. Step 4: Simplify right side
    951.71x = 813,760.39
  5. Step 5: Solve for x
    x = 813,760.39/951.71
  6. Step 6: Final answer
    x = 855.05

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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.