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Finding the Fourth Proportional to 443,407.51, 665,209.68 and 127,839.88

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Solution

The fourth proportional to 443,407.51, 665,209.68 and 127,839.88 is: 191,788.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,407.51 : 665,209.68 = 127,839.88 : x
  2. Step 2: Convert to fraction form
    443,407.51/665,209.68 = 127,839.88/x
  3. Step 3: Cross multiply
    443,407.51x = 665,209.68 × 127,839.88
  4. Step 4: Simplify right side
    443,407.51x = 85,040,325,666.04
  5. Step 5: Solve for x
    x = 85,040,325,666.04/443,407.51
  6. Step 6: Final answer
    x = 191,788.19

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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.