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Finding the Fourth Proportional to 356.69, 492.39 and 251.87

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Solution

The fourth proportional to 356.69, 492.39 and 251.87 is: 347.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.69 : 492.39 = 251.87 : x
  2. Step 2: Convert to fraction form
    356.69/492.39 = 251.87/x
  3. Step 3: Cross multiply
    356.69x = 492.39 × 251.87
  4. Step 4: Simplify right side
    356.69x = 124,015.81
  5. Step 5: Solve for x
    x = 124,015.81/356.69
  6. Step 6: Final answer
    x = 347.69

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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.