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Finding the Fourth Proportional to 391,062.46, 539,666.19 and 212,214.46

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Solution

The fourth proportional to 391,062.46, 539,666.19 and 212,214.46 is: 292,855.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,062.46 : 539,666.19 = 212,214.46 : x
  2. Step 2: Convert to fraction form
    391,062.46/539,666.19 = 212,214.46/x
  3. Step 3: Cross multiply
    391,062.46x = 539,666.19 × 212,214.46
  4. Step 4: Simplify right side
    391,062.46x = 114,524,969,091.11
  5. Step 5: Solve for x
    x = 114,524,969,091.11/391,062.46
  6. Step 6: Final answer
    x = 292,855.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.