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Finding the Fourth Proportional to 937.76, 1,291.68 and 740.84

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Solution

The fourth proportional to 937.76, 1,291.68 and 740.84 is: 1,020.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.76 : 1,291.68 = 740.84 : x
  2. Step 2: Convert to fraction form
    937.76/1,291.68 = 740.84/x
  3. Step 3: Cross multiply
    937.76x = 1,291.68 × 740.84
  4. Step 4: Simplify right side
    937.76x = 956,928.21
  5. Step 5: Solve for x
    x = 956,928.21/937.76
  6. Step 6: Final answer
    x = 1,020.44

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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.