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Finding the Fourth Proportional to 880.66, 1,215.33 and 487.69

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Solution

The fourth proportional to 880.66, 1,215.33 and 487.69 is: 673.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.66 : 1,215.33 = 487.69 : x
  2. Step 2: Convert to fraction form
    880.66/1,215.33 = 487.69/x
  3. Step 3: Cross multiply
    880.66x = 1,215.33 × 487.69
  4. Step 4: Simplify right side
    880.66x = 592,704.29
  5. Step 5: Solve for x
    x = 592,704.29/880.66
  6. Step 6: Final answer
    x = 673.02

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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.