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Finding the Fourth Proportional to 291.95, 402.78 and 181.46

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Solution

The fourth proportional to 291.95, 402.78 and 181.46 is: 250.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.95 : 402.78 = 181.46 : x
  2. Step 2: Convert to fraction form
    291.95/402.78 = 181.46/x
  3. Step 3: Cross multiply
    291.95x = 402.78 × 181.46
  4. Step 4: Simplify right side
    291.95x = 73,088.46
  5. Step 5: Solve for x
    x = 73,088.46/291.95
  6. Step 6: Final answer
    x = 250.35

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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.