Home / 1,962.40-2,708.12-1,078.21

Finding the Fourth Proportional to 1,962.40, 2,708.12 and 1,078.21

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Solution

The fourth proportional to 1,962.40, 2,708.12 and 1,078.21 is: 1,487.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,962.40 : 2,708.12 = 1,078.21 : x
  2. Step 2: Convert to fraction form
    1,962.40/2,708.12 = 1,078.21/x
  3. Step 3: Cross multiply
    1,962.40x = 2,708.12 × 1,078.21
  4. Step 4: Simplify right side
    1,962.40x = 2,919,909.90
  5. Step 5: Solve for x
    x = 2,919,909.90/1,962.40
  6. Step 6: Final answer
    x = 1,487.93

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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.