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Finding the Fourth Proportional to 336,436.80, 504,655.20 and 136,690.80

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Solution

The fourth proportional to 336,436.80, 504,655.20 and 136,690.80 is: 205,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,436.80 : 504,655.20 = 136,690.80 : x
  2. Step 2: Convert to fraction form
    336,436.80/504,655.20 = 136,690.80/x
  3. Step 3: Cross multiply
    336,436.80x = 504,655.20 × 136,690.80
  4. Step 4: Simplify right side
    336,436.80x = 68,981,723,012.16
  5. Step 5: Solve for x
    x = 68,981,723,012.16/336,436.80
  6. Step 6: Final answer
    x = 205,036.20

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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.