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Finding the Fourth Proportional to 891.79, 1,337.86 and 306.83

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Solution

The fourth proportional to 891.79, 1,337.86 and 306.83 is: 460.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.79 : 1,337.86 = 306.83 : x
  2. Step 2: Convert to fraction form
    891.79/1,337.86 = 306.83/x
  3. Step 3: Cross multiply
    891.79x = 1,337.86 × 306.83
  4. Step 4: Simplify right side
    891.79x = 410,495.58
  5. Step 5: Solve for x
    x = 410,495.58/891.79
  6. Step 6: Final answer
    x = 460.31

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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.