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Finding the Fourth Proportional to 880.30, 1,215.03 and 632.18

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Solution

The fourth proportional to 880.30, 1,215.03 and 632.18 is: 872.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.30 : 1,215.03 = 632.18 : x
  2. Step 2: Convert to fraction form
    880.30/1,215.03 = 632.18/x
  3. Step 3: Cross multiply
    880.30x = 1,215.03 × 632.18
  4. Step 4: Simplify right side
    880.30x = 768,117.67
  5. Step 5: Solve for x
    x = 768,117.67/880.30
  6. Step 6: Final answer
    x = 872.56

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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.