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Finding the Fourth Proportional to 248,387.28, 342,765.72 and 135,207.60

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Solution

The fourth proportional to 248,387.28, 342,765.72 and 135,207.60 is: 186,581.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,387.28 : 342,765.72 = 135,207.60 : x
  2. Step 2: Convert to fraction form
    248,387.28/342,765.72 = 135,207.60/x
  3. Step 3: Cross multiply
    248,387.28x = 342,765.72 × 135,207.60
  4. Step 4: Simplify right side
    248,387.28x = 46,344,530,363.47
  5. Step 5: Solve for x
    x = 46,344,530,363.47/248,387.28
  6. Step 6: Final answer
    x = 186,581.74

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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.