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Finding the Fourth Proportional to 426,233.20, 639,868.20 and 320,220.40

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Solution

The fourth proportional to 426,233.20, 639,868.20 and 320,220.40 is: 480,720.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,233.20 : 639,868.20 = 320,220.40 : x
  2. Step 2: Convert to fraction form
    426,233.20/639,868.20 = 320,220.40/x
  3. Step 3: Cross multiply
    426,233.20x = 639,868.20 × 320,220.40
  4. Step 4: Simplify right side
    426,233.20x = 204,898,850,951.28
  5. Step 5: Solve for x
    x = 204,898,850,951.28/426,233.20
  6. Step 6: Final answer
    x = 480,720.06

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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.