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Finding the Fourth Proportional to 888.48, 1,330.95 and 690.96

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Solution

The fourth proportional to 888.48, 1,330.95 and 690.96 is: 1,035.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.48 : 1,330.95 = 690.96 : x
  2. Step 2: Convert to fraction form
    888.48/1,330.95 = 690.96/x
  3. Step 3: Cross multiply
    888.48x = 1,330.95 × 690.96
  4. Step 4: Simplify right side
    888.48x = 919,633.21
  5. Step 5: Solve for x
    x = 919,633.21/888.48
  6. Step 6: Final answer
    x = 1,035.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.