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Finding the Fourth Proportional to 429,958.60, 644,939.46 and 130,441.72

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Solution

The fourth proportional to 429,958.60, 644,939.46 and 130,441.72 is: 195,663.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,958.60 : 644,939.46 = 130,441.72 : x
  2. Step 2: Convert to fraction form
    429,958.60/644,939.46 = 130,441.72/x
  3. Step 3: Cross multiply
    429,958.60x = 644,939.46 × 130,441.72
  4. Step 4: Simplify right side
    429,958.60x = 84,127,012,458.27
  5. Step 5: Solve for x
    x = 84,127,012,458.27/429,958.60
  6. Step 6: Final answer
    x = 195,663.05

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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.