Home / 1,439.90-2,158.92-790.46

Finding the Fourth Proportional to 1,439.90, 2,158.92 and 790.46

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Solution

The fourth proportional to 1,439.90, 2,158.92 and 790.46 is: 1,185.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.90 : 2,158.92 = 790.46 : x
  2. Step 2: Convert to fraction form
    1,439.90/2,158.92 = 790.46/x
  3. Step 3: Cross multiply
    1,439.90x = 2,158.92 × 790.46
  4. Step 4: Simplify right side
    1,439.90x = 1,706,539.90
  5. Step 5: Solve for x
    x = 1,706,539.90/1,439.90
  6. Step 6: Final answer
    x = 1,185.18

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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.