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Finding the Fourth Proportional to 442,862.20, 664,379.70 and 190,142.20

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Solution

The fourth proportional to 442,862.20, 664,379.70 and 190,142.20 is: 285,250.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,862.20 : 664,379.70 = 190,142.20 : x
  2. Step 2: Convert to fraction form
    442,862.20/664,379.70 = 190,142.20/x
  3. Step 3: Cross multiply
    442,862.20x = 664,379.70 × 190,142.20
  4. Step 4: Simplify right side
    442,862.20x = 126,326,617,793.34
  5. Step 5: Solve for x
    x = 126,326,617,793.34/442,862.20
  6. Step 6: Final answer
    x = 285,250.40

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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.