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Finding the Fourth Proportional to 248.70, 373.35 and 139.10

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Solution

The fourth proportional to 248.70, 373.35 and 139.10 is: 208.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.70 : 373.35 = 139.10 : x
  2. Step 2: Convert to fraction form
    248.70/373.35 = 139.10/x
  3. Step 3: Cross multiply
    248.70x = 373.35 × 139.10
  4. Step 4: Simplify right side
    248.70x = 51,932.99
  5. Step 5: Solve for x
    x = 51,932.99/248.70
  6. Step 6: Final answer
    x = 208.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.