Home / 1,438,217.90-2,158,104.45-639,622.70

Finding the Fourth Proportional to 1,438,217.90, 2,158,104.45 and 639,622.70

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Solution

The fourth proportional to 1,438,217.90, 2,158,104.45 and 639,622.70 is: 959,779.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,217.90 : 2,158,104.45 = 639,622.70 : x
  2. Step 2: Convert to fraction form
    1,438,217.90/2,158,104.45 = 639,622.70/x
  3. Step 3: Cross multiply
    1,438,217.90x = 2,158,104.45 × 639,622.70
  4. Step 4: Simplify right side
    1,438,217.90x = 1,380,372,595,191.02
  5. Step 5: Solve for x
    x = 1,380,372,595,191.02/1,438,217.90
  6. Step 6: Final answer
    x = 959,779.87

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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.