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Finding the Fourth Proportional to 270.07, 405.00 and 87.41

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Solution

The fourth proportional to 270.07, 405.00 and 87.41 is: 131.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.07 : 405.00 = 87.41 : x
  2. Step 2: Convert to fraction form
    270.07/405.00 = 87.41/x
  3. Step 3: Cross multiply
    270.07x = 405.00 × 87.41
  4. Step 4: Simplify right side
    270.07x = 35,400.74
  5. Step 5: Solve for x
    x = 35,400.74/270.07
  6. Step 6: Final answer
    x = 131.08

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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.