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Finding the Fourth Proportional to 483,872.40, 724,426.20 and 428,576.40

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Solution

The fourth proportional to 483,872.40, 724,426.20 and 428,576.40 is: 641,640.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,872.40 : 724,426.20 = 428,576.40 : x
  2. Step 2: Convert to fraction form
    483,872.40/724,426.20 = 428,576.40/x
  3. Step 3: Cross multiply
    483,872.40x = 724,426.20 × 428,576.40
  4. Step 4: Simplify right side
    483,872.40x = 310,471,972,861.68
  5. Step 5: Solve for x
    x = 310,471,972,861.68/483,872.40
  6. Step 6: Final answer
    x = 641,640.18

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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.