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Finding the Fourth Proportional to 443,412.63, 665,114.09 and 127,859.31

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Solution

The fourth proportional to 443,412.63, 665,114.09 and 127,859.31 is: 191,787.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,412.63 : 665,114.09 = 127,859.31 : x
  2. Step 2: Convert to fraction form
    443,412.63/665,114.09 = 127,859.31/x
  3. Step 3: Cross multiply
    443,412.63x = 665,114.09 × 127,859.31
  4. Step 4: Simplify right side
    443,412.63x = 85,041,027,979.38
  5. Step 5: Solve for x
    x = 85,041,027,979.38/443,412.63
  6. Step 6: Final answer
    x = 191,787.56

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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.