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Finding the Fourth Proportional to 290,694.68, 436,042.20 and 80,332.80

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Solution

The fourth proportional to 290,694.68, 436,042.20 and 80,332.80 is: 120,499.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,694.68 : 436,042.20 = 80,332.80 : x
  2. Step 2: Convert to fraction form
    290,694.68/436,042.20 = 80,332.80/x
  3. Step 3: Cross multiply
    290,694.68x = 436,042.20 × 80,332.80
  4. Step 4: Simplify right side
    290,694.68x = 35,028,490,844.16
  5. Step 5: Solve for x
    x = 35,028,490,844.16/290,694.68
  6. Step 6: Final answer
    x = 120,499.25

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1.5x scale

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.