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Finding the Fourth Proportional to 391,074.48, 539,682.76 and 212,226.48

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Solution

The fourth proportional to 391,074.48, 539,682.76 and 212,226.48 is: 292,872.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,074.48 : 539,682.76 = 212,226.48 : x
  2. Step 2: Convert to fraction form
    391,074.48/539,682.76 = 212,226.48/x
  3. Step 3: Cross multiply
    391,074.48x = 539,682.76 × 212,226.48
  4. Step 4: Simplify right side
    391,074.48x = 114,534,972,471.49
  5. Step 5: Solve for x
    x = 114,534,972,471.49/391,074.48
  6. Step 6: Final answer
    x = 292,872.53

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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.