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Finding the Fourth Proportional to 536.73, 740.94 and 405.78

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Solution

The fourth proportional to 536.73, 740.94 and 405.78 is: 560.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.73 : 740.94 = 405.78 : x
  2. Step 2: Convert to fraction form
    536.73/740.94 = 405.78/x
  3. Step 3: Cross multiply
    536.73x = 740.94 × 405.78
  4. Step 4: Simplify right side
    536.73x = 300,658.63
  5. Step 5: Solve for x
    x = 300,658.63/536.73
  6. Step 6: Final answer
    x = 560.17

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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.