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Finding the Fourth Proportional to 425,366.80, 638,136.60 and 144,912.40

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Solution

The fourth proportional to 425,366.80, 638,136.60 and 144,912.40 is: 217,398.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,366.80 : 638,136.60 = 144,912.40 : x
  2. Step 2: Convert to fraction form
    425,366.80/638,136.60 = 144,912.40/x
  3. Step 3: Cross multiply
    425,366.80x = 638,136.60 × 144,912.40
  4. Step 4: Simplify right side
    425,366.80x = 92,473,906,233.84
  5. Step 5: Solve for x
    x = 92,473,906,233.84/425,366.80
  6. Step 6: Final answer
    x = 217,398.03

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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.