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Finding the Fourth Proportional to 535.82, 740.61 and 389.48

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Solution

The fourth proportional to 535.82, 740.61 and 389.48 is: 538.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.82 : 740.61 = 389.48 : x
  2. Step 2: Convert to fraction form
    535.82/740.61 = 389.48/x
  3. Step 3: Cross multiply
    535.82x = 740.61 × 389.48
  4. Step 4: Simplify right side
    535.82x = 288,449.08
  5. Step 5: Solve for x
    x = 288,449.08/535.82
  6. Step 6: Final answer
    x = 538.34

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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.