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Finding the Fourth Proportional to 253,391.28, 349,665.48 and 140,207.28

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Solution

The fourth proportional to 253,391.28, 349,665.48 and 140,207.28 is: 193,478.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,391.28 : 349,665.48 = 140,207.28 : x
  2. Step 2: Convert to fraction form
    253,391.28/349,665.48 = 140,207.28/x
  3. Step 3: Cross multiply
    253,391.28x = 349,665.48 × 140,207.28
  4. Step 4: Simplify right side
    253,391.28x = 49,025,645,860.69
  5. Step 5: Solve for x
    x = 49,025,645,860.69/253,391.28
  6. Step 6: Final answer
    x = 193,478.03

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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.