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Finding the Fourth Proportional to 1,938.20, 2,909.46 and 964.04

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Solution

The fourth proportional to 1,938.20, 2,909.46 and 964.04 is: 1,447.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.20 : 2,909.46 = 964.04 : x
  2. Step 2: Convert to fraction form
    1,938.20/2,909.46 = 964.04/x
  3. Step 3: Cross multiply
    1,938.20x = 2,909.46 × 964.04
  4. Step 4: Simplify right side
    1,938.20x = 2,804,835.82
  5. Step 5: Solve for x
    x = 2,804,835.82/1,938.20
  6. Step 6: Final answer
    x = 1,447.13

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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.