Home / 280,314,489.60-420,471,734.40-165,428,755.20

Finding the Fourth Proportional to 280,314,489.60, 420,471,734.40 and 165,428,755.20

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Solution

The fourth proportional to 280,314,489.60, 420,471,734.40 and 165,428,755.20 is: 248,143,132.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,314,489.60 : 420,471,734.40 = 165,428,755.20 : x
  2. Step 2: Convert to fraction form
    280,314,489.60/420,471,734.40 = 165,428,755.20/x
  3. Step 3: Cross multiply
    280,314,489.60x = 420,471,734.40 × 165,428,755.20
  4. Step 4: Simplify right side
    280,314,489.60x = 69,558,115,618,577,008
  5. Step 5: Solve for x
    x = 69,558,115,618,577,008/280,314,489.60
  6. Step 6: Final answer
    x = 248,143,132.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.