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Finding the Fourth Proportional to 951.02, 1,310.36 and 688.58

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Solution

The fourth proportional to 951.02, 1,310.36 and 688.58 is: 948.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.02 : 1,310.36 = 688.58 : x
  2. Step 2: Convert to fraction form
    951.02/1,310.36 = 688.58/x
  3. Step 3: Cross multiply
    951.02x = 1,310.36 × 688.58
  4. Step 4: Simplify right side
    951.02x = 902,287.69
  5. Step 5: Solve for x
    x = 902,287.69/951.02
  6. Step 6: Final answer
    x = 948.76

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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.