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Finding the Fourth Proportional to 847.32, 1,276.07 and 740.44

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Solution

The fourth proportional to 847.32, 1,276.07 and 740.44 is: 1,115.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.32 : 1,276.07 = 740.44 : x
  2. Step 2: Convert to fraction form
    847.32/1,276.07 = 740.44/x
  3. Step 3: Cross multiply
    847.32x = 1,276.07 × 740.44
  4. Step 4: Simplify right side
    847.32x = 944,853.27
  5. Step 5: Solve for x
    x = 944,853.27/847.32
  6. Step 6: Final answer
    x = 1,115.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.