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Finding the Fourth Proportional to 881.66, 1,215.32 and 672.68

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Solution

The fourth proportional to 881.66, 1,215.32 and 672.68 is: 927.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.66 : 1,215.32 = 672.68 : x
  2. Step 2: Convert to fraction form
    881.66/1,215.32 = 672.68/x
  3. Step 3: Cross multiply
    881.66x = 1,215.32 × 672.68
  4. Step 4: Simplify right side
    881.66x = 817,521.46
  5. Step 5: Solve for x
    x = 817,521.46/881.66
  6. Step 6: Final answer
    x = 927.25

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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.