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Finding the Fourth Proportional to 536.28, 740.24 and 405.28

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Solution

The fourth proportional to 536.28, 740.24 and 405.28 is: 559.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.28 : 740.24 = 405.28 : x
  2. Step 2: Convert to fraction form
    536.28/740.24 = 405.28/x
  3. Step 3: Cross multiply
    536.28x = 740.24 × 405.28
  4. Step 4: Simplify right side
    536.28x = 300,004.47
  5. Step 5: Solve for x
    x = 300,004.47/536.28
  6. Step 6: Final answer
    x = 559.42

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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.