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Finding the Fourth Proportional to 429,960.60, 644,942.46 and 130,443.72

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Solution

The fourth proportional to 429,960.60, 644,942.46 and 130,443.72 is: 195,666.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,960.60 : 644,942.46 = 130,443.72 : x
  2. Step 2: Convert to fraction form
    429,960.60/644,942.46 = 130,443.72/x
  3. Step 3: Cross multiply
    429,960.60x = 644,942.46 × 130,443.72
  4. Step 4: Simplify right side
    429,960.60x = 84,128,693,668.35
  5. Step 5: Solve for x
    x = 84,128,693,668.35/429,960.60
  6. Step 6: Final answer
    x = 195,666.05

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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.