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Finding the Fourth Proportional to 535.65, 738.45 and 386.34

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Solution

The fourth proportional to 535.65, 738.45 and 386.34 is: 532.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.65 : 738.45 = 386.34 : x
  2. Step 2: Convert to fraction form
    535.65/738.45 = 386.34/x
  3. Step 3: Cross multiply
    535.65x = 738.45 × 386.34
  4. Step 4: Simplify right side
    535.65x = 285,292.77
  5. Step 5: Solve for x
    x = 285,292.77/535.65
  6. Step 6: Final answer
    x = 532.61

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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.