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Finding the Fourth Proportional to 420,610.36, 580,475.42 and 239,329.92

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Solution

The fourth proportional to 420,610.36, 580,475.42 and 239,329.92 is: 330,294.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,610.36 : 580,475.42 = 239,329.92 : x
  2. Step 2: Convert to fraction form
    420,610.36/580,475.42 = 239,329.92/x
  3. Step 3: Cross multiply
    420,610.36x = 580,475.42 × 239,329.92
  4. Step 4: Simplify right side
    420,610.36x = 138,925,135,830.57
  5. Step 5: Solve for x
    x = 138,925,135,830.57/420,610.36
  6. Step 6: Final answer
    x = 330,294.14

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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.