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Finding the Fourth Proportional to 698.22, 1,049.76 and 644.76

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Solution

The fourth proportional to 698.22, 1,049.76 and 644.76 is: 969.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.22 : 1,049.76 = 644.76 : x
  2. Step 2: Convert to fraction form
    698.22/1,049.76 = 644.76/x
  3. Step 3: Cross multiply
    698.22x = 1,049.76 × 644.76
  4. Step 4: Simplify right side
    698.22x = 676,843.26
  5. Step 5: Solve for x
    x = 676,843.26/698.22
  6. Step 6: Final answer
    x = 969.38

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1.5x scale

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.