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Finding the Fourth Proportional to 270.36, 373.11 and 153.90

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Solution

The fourth proportional to 270.36, 373.11 and 153.90 is: 212.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.36 : 373.11 = 153.90 : x
  2. Step 2: Convert to fraction form
    270.36/373.11 = 153.90/x
  3. Step 3: Cross multiply
    270.36x = 373.11 × 153.90
  4. Step 4: Simplify right side
    270.36x = 57,421.63
  5. Step 5: Solve for x
    x = 57,421.63/270.36
  6. Step 6: Final answer
    x = 212.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.