Home / 645,082.44-890,236.61-354,716.10

Finding the Fourth Proportional to 645,082.44, 890,236.61 and 354,716.10

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Solution

The fourth proportional to 645,082.44, 890,236.61 and 354,716.10 is: 489,520.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,082.44 : 890,236.61 = 354,716.10 : x
  2. Step 2: Convert to fraction form
    645,082.44/890,236.61 = 354,716.10/x
  3. Step 3: Cross multiply
    645,082.44x = 890,236.61 × 354,716.10
  4. Step 4: Simplify right side
    645,082.44x = 315,781,258,376.42
  5. Step 5: Solve for x
    x = 315,781,258,376.42/645,082.44
  6. Step 6: Final answer
    x = 489,520.78

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.