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Finding the Fourth Proportional to 220,191.40, 330,287.10 and 218,117.80

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Solution

The fourth proportional to 220,191.40, 330,287.10 and 218,117.80 is: 327,176.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,191.40 : 330,287.10 = 218,117.80 : x
  2. Step 2: Convert to fraction form
    220,191.40/330,287.10 = 218,117.80/x
  3. Step 3: Cross multiply
    220,191.40x = 330,287.10 × 218,117.80
  4. Step 4: Simplify right side
    220,191.40x = 72,041,495,620.38
  5. Step 5: Solve for x
    x = 72,041,495,620.38/220,191.40
  6. Step 6: Final answer
    x = 327,176.70

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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.