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Finding the Fourth Proportional to 270,671.70, 405,791.28 and 128,445.42

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Solution

The fourth proportional to 270,671.70, 405,791.28 and 128,445.42 is: 192,565.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,671.70 : 405,791.28 = 128,445.42 : x
  2. Step 2: Convert to fraction form
    270,671.70/405,791.28 = 128,445.42/x
  3. Step 3: Cross multiply
    270,671.70x = 405,791.28 × 128,445.42
  4. Step 4: Simplify right side
    270,671.70x = 52,122,031,391.94
  5. Step 5: Solve for x
    x = 52,122,031,391.94/270,671.70
  6. Step 6: Final answer
    x = 192,565.50

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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.