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Finding the Fourth Proportional to 880.16, 1,214.45 and 487.11

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Solution

The fourth proportional to 880.16, 1,214.45 and 487.11 is: 672.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.16 : 1,214.45 = 487.11 : x
  2. Step 2: Convert to fraction form
    880.16/1,214.45 = 487.11/x
  3. Step 3: Cross multiply
    880.16x = 1,214.45 × 487.11
  4. Step 4: Simplify right side
    880.16x = 591,570.13
  5. Step 5: Solve for x
    x = 591,570.13/880.16
  6. Step 6: Final answer
    x = 672.11

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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.