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Finding the Fourth Proportional to 900.88, 1,243.24 and 679.44

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Solution

The fourth proportional to 900.88, 1,243.24 and 679.44 is: 937.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.88 : 1,243.24 = 679.44 : x
  2. Step 2: Convert to fraction form
    900.88/1,243.24 = 679.44/x
  3. Step 3: Cross multiply
    900.88x = 1,243.24 × 679.44
  4. Step 4: Simplify right side
    900.88x = 844,706.99
  5. Step 5: Solve for x
    x = 844,706.99/900.88
  6. Step 6: Final answer
    x = 937.65

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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.