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Finding the Fourth Proportional to 181.90, 271.70 and 156.30

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Solution

The fourth proportional to 181.90, 271.70 and 156.30 is: 233.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.90 : 271.70 = 156.30 : x
  2. Step 2: Convert to fraction form
    181.90/271.70 = 156.30/x
  3. Step 3: Cross multiply
    181.90x = 271.70 × 156.30
  4. Step 4: Simplify right side
    181.90x = 42,464.57
  5. Step 5: Solve for x
    x = 42,464.57/181.90
  6. Step 6: Final answer
    x = 233.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.