Home / 1,380.23-2,070.35-514.55

Finding the Fourth Proportional to 1,380.23, 2,070.35 and 514.55

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Solution

The fourth proportional to 1,380.23, 2,070.35 and 514.55 is: 771.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.23 : 2,070.35 = 514.55 : x
  2. Step 2: Convert to fraction form
    1,380.23/2,070.35 = 514.55/x
  3. Step 3: Cross multiply
    1,380.23x = 2,070.35 × 514.55
  4. Step 4: Simplify right side
    1,380.23x = 1,065,298.59
  5. Step 5: Solve for x
    x = 1,065,298.59/1,380.23
  6. Step 6: Final answer
    x = 771.83

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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.