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Finding the Fourth Proportional to 342,308.78, 472,380.28 and 189,346.85

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Solution

The fourth proportional to 342,308.78, 472,380.28 and 189,346.85 is: 261,295.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,308.78 : 472,380.28 = 189,346.85 : x
  2. Step 2: Convert to fraction form
    342,308.78/472,380.28 = 189,346.85/x
  3. Step 3: Cross multiply
    342,308.78x = 472,380.28 × 189,346.85
  4. Step 4: Simplify right side
    342,308.78x = 89,443,717,841.99
  5. Step 5: Solve for x
    x = 89,443,717,841.99/342,308.78
  6. Step 6: Final answer
    x = 261,295.43

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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.