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Finding the Fourth Proportional to 894.34, 1,234.29 and 672.91

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Solution

The fourth proportional to 894.34, 1,234.29 and 672.91 is: 928.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.34 : 1,234.29 = 672.91 : x
  2. Step 2: Convert to fraction form
    894.34/1,234.29 = 672.91/x
  3. Step 3: Cross multiply
    894.34x = 1,234.29 × 672.91
  4. Step 4: Simplify right side
    894.34x = 830,566.08
  5. Step 5: Solve for x
    x = 830,566.08/894.34
  6. Step 6: Final answer
    x = 928.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.