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Finding the Fourth Proportional to 535.58, 738.88 and 387.89

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Solution

The fourth proportional to 535.58, 738.88 and 387.89 is: 535.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.58 : 738.88 = 387.89 : x
  2. Step 2: Convert to fraction form
    535.58/738.88 = 387.89/x
  3. Step 3: Cross multiply
    535.58x = 738.88 × 387.89
  4. Step 4: Simplify right side
    535.58x = 286,604.16
  5. Step 5: Solve for x
    x = 286,604.16/535.58
  6. Step 6: Final answer
    x = 535.13

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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.