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Finding the Fourth Proportional to 279,969.20, 386,247.20 and 172,352.24

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Solution

The fourth proportional to 279,969.20, 386,247.20 and 172,352.24 is: 237,778.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,969.20 : 386,247.20 = 172,352.24 : x
  2. Step 2: Convert to fraction form
    279,969.20/386,247.20 = 172,352.24/x
  3. Step 3: Cross multiply
    279,969.20x = 386,247.20 × 172,352.24
  4. Step 4: Simplify right side
    279,969.20x = 66,570,570,113.73
  5. Step 5: Solve for x
    x = 66,570,570,113.73/279,969.20
  6. Step 6: Final answer
    x = 237,778.19

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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.