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Finding the Fourth Proportional to 443,405.52, 665,206.70 and 127,837.80

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Solution

The fourth proportional to 443,405.52, 665,206.70 and 127,837.80 is: 191,785.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,405.52 : 665,206.70 = 127,837.80 : x
  2. Step 2: Convert to fraction form
    443,405.52/665,206.70 = 127,837.80/x
  3. Step 3: Cross multiply
    443,405.52x = 665,206.70 × 127,837.80
  4. Step 4: Simplify right side
    443,405.52x = 85,038,561,073.26
  5. Step 5: Solve for x
    x = 85,038,561,073.26/443,405.52
  6. Step 6: Final answer
    x = 191,785.08

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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.