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Finding the Fourth Proportional to 398,807.20, 598,210.80 and 327,948.40

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Solution

The fourth proportional to 398,807.20, 598,210.80 and 327,948.40 is: 491,922.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,807.20 : 598,210.80 = 327,948.40 : x
  2. Step 2: Convert to fraction form
    398,807.20/598,210.80 = 327,948.40/x
  3. Step 3: Cross multiply
    398,807.20x = 598,210.80 × 327,948.40
  4. Step 4: Simplify right side
    398,807.20x = 196,182,274,722.72
  5. Step 5: Solve for x
    x = 196,182,274,722.72/398,807.20
  6. Step 6: Final answer
    x = 491,922.60

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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.