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Finding the Fourth Proportional to 252,463.40, 378,695.10 and 127,788.20

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Solution

The fourth proportional to 252,463.40, 378,695.10 and 127,788.20 is: 191,682.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,463.40 : 378,695.10 = 127,788.20 : x
  2. Step 2: Convert to fraction form
    252,463.40/378,695.10 = 127,788.20/x
  3. Step 3: Cross multiply
    252,463.40x = 378,695.10 × 127,788.20
  4. Step 4: Simplify right side
    252,463.40x = 48,392,765,177.82
  5. Step 5: Solve for x
    x = 48,392,765,177.82/252,463.40
  6. Step 6: Final answer
    x = 191,682.30

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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.