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Finding the Fourth Proportional to 380,169.32, 570,380.65 and 127,474.79

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Solution

The fourth proportional to 380,169.32, 570,380.65 and 127,474.79 is: 191,254.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,169.32 : 570,380.65 = 127,474.79 : x
  2. Step 2: Convert to fraction form
    380,169.32/570,380.65 = 127,474.79/x
  3. Step 3: Cross multiply
    380,169.32x = 570,380.65 × 127,474.79
  4. Step 4: Simplify right side
    380,169.32x = 72,709,150,408.22
  5. Step 5: Solve for x
    x = 72,709,150,408.22/380,169.32
  6. Step 6: Final answer
    x = 191,254.65

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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.