Home / 426,775.50-639,949.95-142,367.04

Finding the Fourth Proportional to 426,775.50, 639,949.95 and 142,367.04

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Solution

The fourth proportional to 426,775.50, 639,949.95 and 142,367.04 is: 213,479.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,775.50 : 639,949.95 = 142,367.04 : x
  2. Step 2: Convert to fraction form
    426,775.50/639,949.95 = 142,367.04/x
  3. Step 3: Cross multiply
    426,775.50x = 639,949.95 × 142,367.04
  4. Step 4: Simplify right side
    426,775.50x = 91,107,780,129.65
  5. Step 5: Solve for x
    x = 91,107,780,129.65/426,775.50
  6. Step 6: Final answer
    x = 213,479.41

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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.