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Finding the Fourth Proportional to 270.04, 405.18 and 99

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Solution

The fourth proportional to 270.04, 405.18 and 99 is: 148.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.04 : 405.18 = 99 : x
  2. Step 2: Convert to fraction form
    270.04/405.18 = 99/x
  3. Step 3: Cross multiply
    270.04x = 405.18 × 99
  4. Step 4: Simplify right side
    270.04x = 40,112.82
  5. Step 5: Solve for x
    x = 40,112.82/270.04
  6. Step 6: Final answer
    x = 148.54

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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.