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Finding the Fourth Proportional to 891.65, 1,337.70 and 306.66

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Solution

The fourth proportional to 891.65, 1,337.70 and 306.66 is: 460.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.65 : 1,337.70 = 306.66 : x
  2. Step 2: Convert to fraction form
    891.65/1,337.70 = 306.66/x
  3. Step 3: Cross multiply
    891.65x = 1,337.70 × 306.66
  4. Step 4: Simplify right side
    891.65x = 410,221.66
  5. Step 5: Solve for x
    x = 410,221.66/891.65
  6. Step 6: Final answer
    x = 460.07

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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.