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Finding the Fourth Proportional to 261.37, 390.52 and 252.29

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Solution

The fourth proportional to 261.37, 390.52 and 252.29 is: 376.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.37 : 390.52 = 252.29 : x
  2. Step 2: Convert to fraction form
    261.37/390.52 = 252.29/x
  3. Step 3: Cross multiply
    261.37x = 390.52 × 252.29
  4. Step 4: Simplify right side
    261.37x = 98,521.71
  5. Step 5: Solve for x
    x = 98,521.71/261.37
  6. Step 6: Final answer
    x = 376.95

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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.