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Finding the Fourth Proportional to 420,551.39, 580,340.70 and 239,246.33

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Solution

The fourth proportional to 420,551.39, 580,340.70 and 239,246.33 is: 330,148.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,551.39 : 580,340.70 = 239,246.33 : x
  2. Step 2: Convert to fraction form
    420,551.39/580,340.70 = 239,246.33/x
  3. Step 3: Cross multiply
    420,551.39x = 580,340.70 × 239,246.33
  4. Step 4: Simplify right side
    420,551.39x = 138,844,379,722.93
  5. Step 5: Solve for x
    x = 138,844,379,722.93/420,551.39
  6. Step 6: Final answer
    x = 330,148.42

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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.