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Finding the Fourth Proportional to 218.04, 300.68 and 139.27

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Solution

The fourth proportional to 218.04, 300.68 and 139.27 is: 192.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.04 : 300.68 = 139.27 : x
  2. Step 2: Convert to fraction form
    218.04/300.68 = 139.27/x
  3. Step 3: Cross multiply
    218.04x = 300.68 × 139.27
  4. Step 4: Simplify right side
    218.04x = 41,875.34
  5. Step 5: Solve for x
    x = 41,875.34/218.04
  6. Step 6: Final answer
    x = 192.05

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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.