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Finding the Fourth Proportional to 659,626.40, 989,439.60 and 376,191.20

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Solution

The fourth proportional to 659,626.40, 989,439.60 and 376,191.20 is: 564,286.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,626.40 : 989,439.60 = 376,191.20 : x
  2. Step 2: Convert to fraction form
    659,626.40/989,439.60 = 376,191.20/x
  3. Step 3: Cross multiply
    659,626.40x = 989,439.60 × 376,191.20
  4. Step 4: Simplify right side
    659,626.40x = 372,218,470,451.52
  5. Step 5: Solve for x
    x = 372,218,470,451.52/659,626.40
  6. Step 6: Final answer
    x = 564,286.80

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Similar ratio
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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.