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Finding the Fourth Proportional to 289.18, 398.98 and 184.20

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Solution

The fourth proportional to 289.18, 398.98 and 184.20 is: 254.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.18 : 398.98 = 184.20 : x
  2. Step 2: Convert to fraction form
    289.18/398.98 = 184.20/x
  3. Step 3: Cross multiply
    289.18x = 398.98 × 184.20
  4. Step 4: Simplify right side
    289.18x = 73,492.12
  5. Step 5: Solve for x
    x = 73,492.12/289.18
  6. Step 6: Final answer
    x = 254.14

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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.