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Finding the Fourth Proportional to 688.43, 947.27 and 672.03

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Solution

The fourth proportional to 688.43, 947.27 and 672.03 is: 924.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.43 : 947.27 = 672.03 : x
  2. Step 2: Convert to fraction form
    688.43/947.27 = 672.03/x
  3. Step 3: Cross multiply
    688.43x = 947.27 × 672.03
  4. Step 4: Simplify right side
    688.43x = 636,590.50
  5. Step 5: Solve for x
    x = 636,590.50/688.43
  6. Step 6: Final answer
    x = 924.71

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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.