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Finding the Fourth Proportional to 270.02, 405.03 and 87.35

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Solution

The fourth proportional to 270.02, 405.03 and 87.35 is: 131.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.02 : 405.03 = 87.35 : x
  2. Step 2: Convert to fraction form
    270.02/405.03 = 87.35/x
  3. Step 3: Cross multiply
    270.02x = 405.03 × 87.35
  4. Step 4: Simplify right side
    270.02x = 35,377.67
  5. Step 5: Solve for x
    x = 35,377.67/270.02
  6. Step 6: Final answer
    x = 131.02

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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.