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Finding the Fourth Proportional to 239.02, 355.91 and 238.01

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Solution

The fourth proportional to 239.02, 355.91 and 238.01 is: 354.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.02 : 355.91 = 238.01 : x
  2. Step 2: Convert to fraction form
    239.02/355.91 = 238.01/x
  3. Step 3: Cross multiply
    239.02x = 355.91 × 238.01
  4. Step 4: Simplify right side
    239.02x = 84,707.17
  5. Step 5: Solve for x
    x = 84,707.17/239.02
  6. Step 6: Final answer
    x = 354.40

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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.