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Finding the Fourth Proportional to 442,887.40, 664,266.30 and 127,311.40

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Solution

The fourth proportional to 442,887.40, 664,266.30 and 127,311.40 is: 190,948.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,887.40 : 664,266.30 = 127,311.40 : x
  2. Step 2: Convert to fraction form
    442,887.40/664,266.30 = 127,311.40/x
  3. Step 3: Cross multiply
    442,887.40x = 664,266.30 × 127,311.40
  4. Step 4: Simplify right side
    442,887.40x = 84,568,672,625.82
  5. Step 5: Solve for x
    x = 84,568,672,625.82/442,887.40
  6. Step 6: Final answer
    x = 190,948.47

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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.