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Finding the Fourth Proportional to 292.28, 403.89 and 278.05

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Solution

The fourth proportional to 292.28, 403.89 and 278.05 is: 384.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.28 : 403.89 = 278.05 : x
  2. Step 2: Convert to fraction form
    292.28/403.89 = 278.05/x
  3. Step 3: Cross multiply
    292.28x = 403.89 × 278.05
  4. Step 4: Simplify right side
    292.28x = 112,299.21
  5. Step 5: Solve for x
    x = 112,299.21/292.28
  6. Step 6: Final answer
    x = 384.21

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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.