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Finding the Fourth Proportional to 391,067.64, 539,673.33 and 212,219.64

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Solution

The fourth proportional to 391,067.64, 539,673.33 and 212,219.64 is: 292,863.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,067.64 : 539,673.33 = 212,219.64 : x
  2. Step 2: Convert to fraction form
    391,067.64/539,673.33 = 212,219.64/x
  3. Step 3: Cross multiply
    391,067.64x = 539,673.33 × 212,219.64
  4. Step 4: Simplify right side
    391,067.64x = 114,529,279,810.20
  5. Step 5: Solve for x
    x = 114,529,279,810.20/391,067.64
  6. Step 6: Final answer
    x = 292,863.10

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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.