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Finding the Fourth Proportional to 218,717.40, 328,076.10 and 135,658.20

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Solution

The fourth proportional to 218,717.40, 328,076.10 and 135,658.20 is: 203,487.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,717.40 : 328,076.10 = 135,658.20 : x
  2. Step 2: Convert to fraction form
    218,717.40/328,076.10 = 135,658.20/x
  3. Step 3: Cross multiply
    218,717.40x = 328,076.10 × 135,658.20
  4. Step 4: Simplify right side
    218,717.40x = 44,506,213,189.02
  5. Step 5: Solve for x
    x = 44,506,213,189.02/218,717.40
  6. Step 6: Final answer
    x = 203,487.30

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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.