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Finding the Fourth Proportional to 766.62, 1,063.36 and 740.40

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Solution

The fourth proportional to 766.62, 1,063.36 and 740.40 is: 1,026.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.62 : 1,063.36 = 740.40 : x
  2. Step 2: Convert to fraction form
    766.62/1,063.36 = 740.40/x
  3. Step 3: Cross multiply
    766.62x = 1,063.36 × 740.40
  4. Step 4: Simplify right side
    766.62x = 787,311.74
  5. Step 5: Solve for x
    x = 787,311.74/766.62
  6. Step 6: Final answer
    x = 1,026.99

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.