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Finding the Fourth Proportional to 425.98, 638.90 and 152.01

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Solution

The fourth proportional to 425.98, 638.90 and 152.01 is: 227.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.98 : 638.90 = 152.01 : x
  2. Step 2: Convert to fraction form
    425.98/638.90 = 152.01/x
  3. Step 3: Cross multiply
    425.98x = 638.90 × 152.01
  4. Step 4: Simplify right side
    425.98x = 97,119.19
  5. Step 5: Solve for x
    x = 97,119.19/425.98
  6. Step 6: Final answer
    x = 227.99

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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.