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Finding the Fourth Proportional to 880.53, 1,215.15 and 487.59

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Solution

The fourth proportional to 880.53, 1,215.15 and 487.59 is: 672.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.53 : 1,215.15 = 487.59 : x
  2. Step 2: Convert to fraction form
    880.53/1,215.15 = 487.59/x
  3. Step 3: Cross multiply
    880.53x = 1,215.15 × 487.59
  4. Step 4: Simplify right side
    880.53x = 592,494.99
  5. Step 5: Solve for x
    x = 592,494.99/880.53
  6. Step 6: Final answer
    x = 672.88

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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.