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Finding the Fourth Proportional to 888.24, 1,225.06 and 665.88

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Solution

The fourth proportional to 888.24, 1,225.06 and 665.88 is: 918.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.24 : 1,225.06 = 665.88 : x
  2. Step 2: Convert to fraction form
    888.24/1,225.06 = 665.88/x
  3. Step 3: Cross multiply
    888.24x = 1,225.06 × 665.88
  4. Step 4: Simplify right side
    888.24x = 815,742.95
  5. Step 5: Solve for x
    x = 815,742.95/888.24
  6. Step 6: Final answer
    x = 918.38

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Double scale
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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.