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Finding the Fourth Proportional to 261.50, 362.41 and 256.64

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Solution

The fourth proportional to 261.50, 362.41 and 256.64 is: 355.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.50 : 362.41 = 256.64 : x
  2. Step 2: Convert to fraction form
    261.50/362.41 = 256.64/x
  3. Step 3: Cross multiply
    261.50x = 362.41 × 256.64
  4. Step 4: Simplify right side
    261.50x = 93,006.45
  5. Step 5: Solve for x
    x = 93,006.45/261.50
  6. Step 6: Final answer
    x = 355.67

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.