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Finding the Fourth Proportional to 739.35, 1,108.41 and 392.47

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Solution

The fourth proportional to 739.35, 1,108.41 and 392.47 is: 588.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.35 : 1,108.41 = 392.47 : x
  2. Step 2: Convert to fraction form
    739.35/1,108.41 = 392.47/x
  3. Step 3: Cross multiply
    739.35x = 1,108.41 × 392.47
  4. Step 4: Simplify right side
    739.35x = 435,017.67
  5. Step 5: Solve for x
    x = 435,017.67/739.35
  6. Step 6: Final answer
    x = 588.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.