Home / 426,834.40-639,409.20-216,623.20

Finding the Fourth Proportional to 426,834.40, 639,409.20 and 216,623.20

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Solution

The fourth proportional to 426,834.40, 639,409.20 and 216,623.20 is: 324,507.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,834.40 : 639,409.20 = 216,623.20 : x
  2. Step 2: Convert to fraction form
    426,834.40/639,409.20 = 216,623.20/x
  3. Step 3: Cross multiply
    426,834.40x = 639,409.20 × 216,623.20
  4. Step 4: Simplify right side
    426,834.40x = 138,510,867,013.44
  5. Step 5: Solve for x
    x = 138,510,867,013.44/426,834.40
  6. Step 6: Final answer
    x = 324,507.27

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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.