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Finding the Fourth Proportional to 442,868.20, 664,302.30 and 380,660.20

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Solution

The fourth proportional to 442,868.20, 664,302.30 and 380,660.20 is: 570,990.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,868.20 : 664,302.30 = 380,660.20 : x
  2. Step 2: Convert to fraction form
    442,868.20/664,302.30 = 380,660.20/x
  3. Step 3: Cross multiply
    442,868.20x = 664,302.30 × 380,660.20
  4. Step 4: Simplify right side
    442,868.20x = 252,873,446,378.46
  5. Step 5: Solve for x
    x = 252,873,446,378.46/442,868.20
  6. Step 6: Final answer
    x = 570,990.30

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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.