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Finding the Fourth Proportional to 420,365.39, 580,098.80 and 229,375.49

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Solution

The fourth proportional to 420,365.39, 580,098.80 and 229,375.49 is: 316,535.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,365.39 : 580,098.80 = 229,375.49 : x
  2. Step 2: Convert to fraction form
    420,365.39/580,098.80 = 229,375.49/x
  3. Step 3: Cross multiply
    420,365.39x = 580,098.80 × 229,375.49
  4. Step 4: Simplify right side
    420,365.39x = 133,060,445,351.54
  5. Step 5: Solve for x
    x = 133,060,445,351.54/420,365.39
  6. Step 6: Final answer
    x = 316,535.21

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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.