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Finding the Fourth Proportional to 405.31, 607.69 and 158.38

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Solution

The fourth proportional to 405.31, 607.69 and 158.38 is: 237.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.31 : 607.69 = 158.38 : x
  2. Step 2: Convert to fraction form
    405.31/607.69 = 158.38/x
  3. Step 3: Cross multiply
    405.31x = 607.69 × 158.38
  4. Step 4: Simplify right side
    405.31x = 96,245.94
  5. Step 5: Solve for x
    x = 96,245.94/405.31
  6. Step 6: Final answer
    x = 237.46

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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.