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Finding the Fourth Proportional to 356.64, 492.20 and 251.69

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Solution

The fourth proportional to 356.64, 492.20 and 251.69 is: 347.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.64 : 492.20 = 251.69 : x
  2. Step 2: Convert to fraction form
    356.64/492.20 = 251.69/x
  3. Step 3: Cross multiply
    356.64x = 492.20 × 251.69
  4. Step 4: Simplify right side
    356.64x = 123,878.10
  5. Step 5: Solve for x
    x = 123,878.10/356.64
  6. Step 6: Final answer
    x = 347.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.