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Finding the Fourth Proportional to 881.08, 1,215.85 and 482.74

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Solution

The fourth proportional to 881.08, 1,215.85 and 482.74 is: 666.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.08 : 1,215.85 = 482.74 : x
  2. Step 2: Convert to fraction form
    881.08/1,215.85 = 482.74/x
  3. Step 3: Cross multiply
    881.08x = 1,215.85 × 482.74
  4. Step 4: Simplify right side
    881.08x = 586,939.43
  5. Step 5: Solve for x
    x = 586,939.43/881.08
  6. Step 6: Final answer
    x = 666.16

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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.