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Finding the Fourth Proportional to 880.63, 1,215.27 and 487.64

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Solution

The fourth proportional to 880.63, 1,215.27 and 487.64 is: 672.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.63 : 1,215.27 = 487.64 : x
  2. Step 2: Convert to fraction form
    880.63/1,215.27 = 487.64/x
  3. Step 3: Cross multiply
    880.63x = 1,215.27 × 487.64
  4. Step 4: Simplify right side
    880.63x = 592,615.47
  5. Step 5: Solve for x
    x = 592,615.47/880.63
  6. Step 6: Final answer
    x = 672.95

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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.