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Finding the Fourth Proportional to 740.44, 1,108.36 and 392.91

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Solution

The fourth proportional to 740.44, 1,108.36 and 392.91 is: 588.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.44 : 1,108.36 = 392.91 : x
  2. Step 2: Convert to fraction form
    740.44/1,108.36 = 392.91/x
  3. Step 3: Cross multiply
    740.44x = 1,108.36 × 392.91
  4. Step 4: Simplify right side
    740.44x = 435,483.76
  5. Step 5: Solve for x
    x = 435,483.76/740.44
  6. Step 6: Final answer
    x = 588.15

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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.