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Finding the Fourth Proportional to 328,115.60, 490,375.22 and 239,555.60

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Solution

The fourth proportional to 328,115.60, 490,375.22 and 239,555.60 is: 358,020.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,115.60 : 490,375.22 = 239,555.60 : x
  2. Step 2: Convert to fraction form
    328,115.60/490,375.22 = 239,555.60/x
  3. Step 3: Cross multiply
    328,115.60x = 490,375.22 × 239,555.60
  4. Step 4: Simplify right side
    328,115.60x = 117,472,130,052.23
  5. Step 5: Solve for x
    x = 117,472,130,052.23/328,115.60
  6. Step 6: Final answer
    x = 358,020.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.