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Finding the Fourth Proportional to 284.90, 393.34 and 180.12

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Solution

The fourth proportional to 284.90, 393.34 and 180.12 is: 248.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.90 : 393.34 = 180.12 : x
  2. Step 2: Convert to fraction form
    284.90/393.34 = 180.12/x
  3. Step 3: Cross multiply
    284.90x = 393.34 × 180.12
  4. Step 4: Simplify right side
    284.90x = 70,848.40
  5. Step 5: Solve for x
    x = 70,848.40/284.90
  6. Step 6: Final answer
    x = 248.68

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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.