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Finding the Fourth Proportional to 535.11, 737.76 and 387.69

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Solution

The fourth proportional to 535.11, 737.76 and 387.69 is: 534.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.11 : 737.76 = 387.69 : x
  2. Step 2: Convert to fraction form
    535.11/737.76 = 387.69/x
  3. Step 3: Cross multiply
    535.11x = 737.76 × 387.69
  4. Step 4: Simplify right side
    535.11x = 286,022.17
  5. Step 5: Solve for x
    x = 286,022.17/535.11
  6. Step 6: Final answer
    x = 534.51

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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.