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Finding the Fourth Proportional to 442,703.20, 660,601.99 and 394,990.30

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Solution

The fourth proportional to 442,703.20, 660,601.99 and 394,990.30 is: 589,404.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,703.20 : 660,601.99 = 394,990.30 : x
  2. Step 2: Convert to fraction form
    442,703.20/660,601.99 = 394,990.30/x
  3. Step 3: Cross multiply
    442,703.20x = 660,601.99 × 394,990.30
  4. Step 4: Simplify right side
    442,703.20x = 260,931,376,235.75
  5. Step 5: Solve for x
    x = 260,931,376,235.75/442,703.20
  6. Step 6: Final answer
    x = 589,404.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.