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Finding the Fourth Proportional to 457.43, 684.36 and 405.47

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Solution

The fourth proportional to 457.43, 684.36 and 405.47 is: 606.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.43 : 684.36 = 405.47 : x
  2. Step 2: Convert to fraction form
    457.43/684.36 = 405.47/x
  3. Step 3: Cross multiply
    457.43x = 684.36 × 405.47
  4. Step 4: Simplify right side
    457.43x = 277,489.16
  5. Step 5: Solve for x
    x = 277,489.16/457.43
  6. Step 6: Final answer
    x = 606.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.