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Finding the Fourth Proportional to 391,062.42, 539,666.10 and 212,214.42

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Solution

The fourth proportional to 391,062.42, 539,666.10 and 212,214.42 is: 292,855.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,062.42 : 539,666.10 = 212,214.42 : x
  2. Step 2: Convert to fraction form
    391,062.42/539,666.10 = 212,214.42/x
  3. Step 3: Cross multiply
    391,062.42x = 539,666.10 × 212,214.42
  4. Step 4: Simplify right side
    391,062.42x = 114,524,928,405.16
  5. Step 5: Solve for x
    x = 114,524,928,405.16/391,062.42
  6. Step 6: Final answer
    x = 292,855.88

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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.