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Finding the Fourth Proportional to 442,905.70, 664,358.55 and 218,308.90

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Solution

The fourth proportional to 442,905.70, 664,358.55 and 218,308.90 is: 327,463.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,905.70 : 664,358.55 = 218,308.90 : x
  2. Step 2: Convert to fraction form
    442,905.70/664,358.55 = 218,308.90/x
  3. Step 3: Cross multiply
    442,905.70x = 664,358.55 × 218,308.90
  4. Step 4: Simplify right side
    442,905.70x = 145,035,384,256.10
  5. Step 5: Solve for x
    x = 145,035,384,256.10/442,905.70
  6. Step 6: Final answer
    x = 327,463.35

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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.