Home / 803,138.70-1,205,145.45-329,871.90

Finding the Fourth Proportional to 803,138.70, 1,205,145.45 and 329,871.90

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Solution

The fourth proportional to 803,138.70, 1,205,145.45 and 329,871.90 is: 494,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,138.70 : 1,205,145.45 = 329,871.90 : x
  2. Step 2: Convert to fraction form
    803,138.70/1,205,145.45 = 329,871.90/x
  3. Step 3: Cross multiply
    803,138.70x = 1,205,145.45 × 329,871.90
  4. Step 4: Simplify right side
    803,138.70x = 397,543,619,367.86
  5. Step 5: Solve for x
    x = 397,543,619,367.86/803,138.70
  6. Step 6: Final answer
    x = 494,987.50

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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.