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Finding the Fourth Proportional to 739.01, 1,113.50 and 611.84

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Solution

The fourth proportional to 739.01, 1,113.50 and 611.84 is: 921.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.01 : 1,113.50 = 611.84 : x
  2. Step 2: Convert to fraction form
    739.01/1,113.50 = 611.84/x
  3. Step 3: Cross multiply
    739.01x = 1,113.50 × 611.84
  4. Step 4: Simplify right side
    739.01x = 681,275.21
  5. Step 5: Solve for x
    x = 681,275.21/739.01
  6. Step 6: Final answer
    x = 921.88

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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.