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Finding the Fourth Proportional to 291,940.50, 438,080.85 and 123,450.78

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Solution

The fourth proportional to 291,940.50, 438,080.85 and 123,450.78 is: 185,248.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,940.50 : 438,080.85 = 123,450.78 : x
  2. Step 2: Convert to fraction form
    291,940.50/438,080.85 = 123,450.78/x
  3. Step 3: Cross multiply
    291,940.50x = 438,080.85 × 123,450.78
  4. Step 4: Simplify right side
    291,940.50x = 54,081,422,635.56
  5. Step 5: Solve for x
    x = 54,081,422,635.56/291,940.50
  6. Step 6: Final answer
    x = 185,248.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.