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Finding the Fourth Proportional to 429,858.60, 644,793.30 and 130,342.20

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Solution

The fourth proportional to 429,858.60, 644,793.30 and 130,342.20 is: 195,514.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,858.60 : 644,793.30 = 130,342.20 : x
  2. Step 2: Convert to fraction form
    429,858.60/644,793.30 = 130,342.20/x
  3. Step 3: Cross multiply
    429,858.60x = 644,793.30 × 130,342.20
  4. Step 4: Simplify right side
    429,858.60x = 84,043,777,267.26
  5. Step 5: Solve for x
    x = 84,043,777,267.26/429,858.60
  6. Step 6: Final answer
    x = 195,514.94

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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.