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Finding the Fourth Proportional to 442,890.90, 664,433.55 and 218,358.90

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Solution

The fourth proportional to 442,890.90, 664,433.55 and 218,358.90 is: 327,586.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,890.90 : 664,433.55 = 218,358.90 : x
  2. Step 2: Convert to fraction form
    442,890.90/664,433.55 = 218,358.90/x
  3. Step 3: Cross multiply
    442,890.90x = 664,433.55 × 218,358.90
  4. Step 4: Simplify right side
    442,890.90x = 145,084,979,101.10
  5. Step 5: Solve for x
    x = 145,084,979,101.10/442,890.90
  6. Step 6: Final answer
    x = 327,586.27

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1.5x scale

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.