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Finding the Fourth Proportional to 836.47, 1,255.15 and 374.23

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Solution

The fourth proportional to 836.47, 1,255.15 and 374.23 is: 561.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.47 : 1,255.15 = 374.23 : x
  2. Step 2: Convert to fraction form
    836.47/1,255.15 = 374.23/x
  3. Step 3: Cross multiply
    836.47x = 1,255.15 × 374.23
  4. Step 4: Simplify right side
    836.47x = 469,714.78
  5. Step 5: Solve for x
    x = 469,714.78/836.47
  6. Step 6: Final answer
    x = 561.54

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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.