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Finding the Fourth Proportional to 287.39, 396.61 and 176.93

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Solution

The fourth proportional to 287.39, 396.61 and 176.93 is: 244.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.39 : 396.61 = 176.93 : x
  2. Step 2: Convert to fraction form
    287.39/396.61 = 176.93/x
  3. Step 3: Cross multiply
    287.39x = 396.61 × 176.93
  4. Step 4: Simplify right side
    287.39x = 70,172.34
  5. Step 5: Solve for x
    x = 70,172.34/287.39
  6. Step 6: Final answer
    x = 244.17

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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.