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Finding the Fourth Proportional to 882.21, 1,217.86 and 672.42

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Solution

The fourth proportional to 882.21, 1,217.86 and 672.42 is: 928.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.21 : 1,217.86 = 672.42 : x
  2. Step 2: Convert to fraction form
    882.21/1,217.86 = 672.42/x
  3. Step 3: Cross multiply
    882.21x = 1,217.86 × 672.42
  4. Step 4: Simplify right side
    882.21x = 818,911.74
  5. Step 5: Solve for x
    x = 818,911.74/882.21
  6. Step 6: Final answer
    x = 928.25

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1.5x scale

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.