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Finding the Fourth Proportional to 388.40, 534.84 and 367.04

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Solution

The fourth proportional to 388.40, 534.84 and 367.04 is: 505.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.40 : 534.84 = 367.04 : x
  2. Step 2: Convert to fraction form
    388.40/534.84 = 367.04/x
  3. Step 3: Cross multiply
    388.40x = 534.84 × 367.04
  4. Step 4: Simplify right side
    388.40x = 196,307.67
  5. Step 5: Solve for x
    x = 196,307.67/388.40
  6. Step 6: Final answer
    x = 505.43

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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.