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Finding the Fourth Proportional to 280,422.76, 387,027.84 and 178,341.79

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Solution

The fourth proportional to 280,422.76, 387,027.84 and 178,341.79 is: 246,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,422.76 : 387,027.84 = 178,341.79 : x
  2. Step 2: Convert to fraction form
    280,422.76/387,027.84 = 178,341.79/x
  3. Step 3: Cross multiply
    280,422.76x = 387,027.84 × 178,341.79
  4. Step 4: Simplify right side
    280,422.76x = 69,023,237,765.43
  5. Step 5: Solve for x
    x = 69,023,237,765.43/280,422.76
  6. Step 6: Final answer
    x = 246,139.93

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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.