Home / 426,113.20-639,169.80-159,882.40

Finding the Fourth Proportional to 426,113.20, 639,169.80 and 159,882.40

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Solution

The fourth proportional to 426,113.20, 639,169.80 and 159,882.40 is: 239,823.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,113.20 : 639,169.80 = 159,882.40 : x
  2. Step 2: Convert to fraction form
    426,113.20/639,169.80 = 159,882.40/x
  3. Step 3: Cross multiply
    426,113.20x = 639,169.80 × 159,882.40
  4. Step 4: Simplify right side
    426,113.20x = 102,192,001,631.52
  5. Step 5: Solve for x
    x = 102,192,001,631.52/426,113.20
  6. Step 6: Final answer
    x = 239,823.60

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1.5x scale

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.