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Finding the Fourth Proportional to 442,673.40, 664,355.70 and 206,045.40

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Solution

The fourth proportional to 442,673.40, 664,355.70 and 206,045.40 is: 309,228.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,673.40 : 664,355.70 = 206,045.40 : x
  2. Step 2: Convert to fraction form
    442,673.40/664,355.70 = 206,045.40/x
  3. Step 3: Cross multiply
    442,673.40x = 664,355.70 × 206,045.40
  4. Step 4: Simplify right side
    442,673.40x = 136,887,435,948.78
  5. Step 5: Solve for x
    x = 136,887,435,948.78/442,673.40
  6. Step 6: Final answer
    x = 309,228.96

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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.