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Finding the Fourth Proportional to 218,689.40, 328,034.10 and 199,335.80

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Solution

The fourth proportional to 218,689.40, 328,034.10 and 199,335.80 is: 299,003.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,689.40 : 328,034.10 = 199,335.80 : x
  2. Step 2: Convert to fraction form
    218,689.40/328,034.10 = 199,335.80/x
  3. Step 3: Cross multiply
    218,689.40x = 328,034.10 × 199,335.80
  4. Step 4: Simplify right side
    218,689.40x = 65,388,939,750.78
  5. Step 5: Solve for x
    x = 65,388,939,750.78/218,689.40
  6. Step 6: Final answer
    x = 299,003.70

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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.