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Finding the Fourth Proportional to 2,633.28, 3,948.84 and 988.98

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Solution

The fourth proportional to 2,633.28, 3,948.84 and 988.98 is: 1,483.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,633.28 : 3,948.84 = 988.98 : x
  2. Step 2: Convert to fraction form
    2,633.28/3,948.84 = 988.98/x
  3. Step 3: Cross multiply
    2,633.28x = 3,948.84 × 988.98
  4. Step 4: Simplify right side
    2,633.28x = 3,905,323.78
  5. Step 5: Solve for x
    x = 3,905,323.78/2,633.28
  6. Step 6: Final answer
    x = 1,483.06

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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.