Home / 642,408.20-963,612.30-327,480.20

Finding the Fourth Proportional to 642,408.20, 963,612.30 and 327,480.20

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Solution

The fourth proportional to 642,408.20, 963,612.30 and 327,480.20 is: 491,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,408.20 : 963,612.30 = 327,480.20 : x
  2. Step 2: Convert to fraction form
    642,408.20/963,612.30 = 327,480.20/x
  3. Step 3: Cross multiply
    642,408.20x = 963,612.30 × 327,480.20
  4. Step 4: Simplify right side
    642,408.20x = 315,563,948,726.46
  5. Step 5: Solve for x
    x = 315,563,948,726.46/642,408.20
  6. Step 6: Final answer
    x = 491,220.30

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Half scale
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Double scale
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Similar ratio
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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.