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Finding the Fourth Proportional to 836.98, 1,254.96 and 398.36

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Solution

The fourth proportional to 836.98, 1,254.96 and 398.36 is: 597.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.98 : 1,254.96 = 398.36 : x
  2. Step 2: Convert to fraction form
    836.98/1,254.96 = 398.36/x
  3. Step 3: Cross multiply
    836.98x = 1,254.96 × 398.36
  4. Step 4: Simplify right side
    836.98x = 499,929.00
  5. Step 5: Solve for x
    x = 499,929.00/836.98
  6. Step 6: Final answer
    x = 597.30

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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.