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Finding the Fourth Proportional to 420,422.78, 580,195.68 and 229,448.54

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Solution

The fourth proportional to 420,422.78, 580,195.68 and 229,448.54 is: 316,645.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,422.78 : 580,195.68 = 229,448.54 : x
  2. Step 2: Convert to fraction form
    420,422.78/580,195.68 = 229,448.54/x
  3. Step 3: Cross multiply
    420,422.78x = 580,195.68 × 229,448.54
  4. Step 4: Simplify right side
    420,422.78x = 133,125,051,690.31
  5. Step 5: Solve for x
    x = 133,125,051,690.31/420,422.78
  6. Step 6: Final answer
    x = 316,645.67

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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.