Home / 280,198.12-386,816.10-216,392.68

Finding the Fourth Proportional to 280,198.12, 386,816.10 and 216,392.68

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Solution

The fourth proportional to 280,198.12, 386,816.10 and 216,392.68 is: 298,732.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,198.12 : 386,816.10 = 216,392.68 : x
  2. Step 2: Convert to fraction form
    280,198.12/386,816.10 = 216,392.68/x
  3. Step 3: Cross multiply
    280,198.12x = 386,816.10 × 216,392.68
  4. Step 4: Simplify right side
    280,198.12x = 83,704,172,546.15
  5. Step 5: Solve for x
    x = 83,704,172,546.15/280,198.12
  6. Step 6: Final answer
    x = 298,732.10

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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.