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Finding the Fourth Proportional to 891.98, 1,337.95 and 314.72

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Solution

The fourth proportional to 891.98, 1,337.95 and 314.72 is: 472.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.98 : 1,337.95 = 314.72 : x
  2. Step 2: Convert to fraction form
    891.98/1,337.95 = 314.72/x
  3. Step 3: Cross multiply
    891.98x = 1,337.95 × 314.72
  4. Step 4: Simplify right side
    891.98x = 421,079.62
  5. Step 5: Solve for x
    x = 421,079.62/891.98
  6. Step 6: Final answer
    x = 472.07

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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.