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Finding the Fourth Proportional to 521,084.40, 781,626.60 and 221,465.40

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Solution

The fourth proportional to 521,084.40, 781,626.60 and 221,465.40 is: 332,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,084.40 : 781,626.60 = 221,465.40 : x
  2. Step 2: Convert to fraction form
    521,084.40/781,626.60 = 221,465.40/x
  3. Step 3: Cross multiply
    521,084.40x = 781,626.60 × 221,465.40
  4. Step 4: Simplify right side
    521,084.40x = 173,103,247,619.64
  5. Step 5: Solve for x
    x = 173,103,247,619.64/521,084.40
  6. Step 6: Final answer
    x = 332,198.10

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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.