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Finding the Fourth Proportional to 970.28, 1,337.42 and 743.68

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Solution

The fourth proportional to 970.28, 1,337.42 and 743.68 is: 1,025.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.28 : 1,337.42 = 743.68 : x
  2. Step 2: Convert to fraction form
    970.28/1,337.42 = 743.68/x
  3. Step 3: Cross multiply
    970.28x = 1,337.42 × 743.68
  4. Step 4: Simplify right side
    970.28x = 994,605.82
  5. Step 5: Solve for x
    x = 994,605.82/970.28
  6. Step 6: Final answer
    x = 1,025.08

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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.