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Finding the Fourth Proportional to 633.24, 873.54 and 393.93

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Solution

The fourth proportional to 633.24, 873.54 and 393.93 is: 543.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.24 : 873.54 = 393.93 : x
  2. Step 2: Convert to fraction form
    633.24/873.54 = 393.93/x
  3. Step 3: Cross multiply
    633.24x = 873.54 × 393.93
  4. Step 4: Simplify right side
    633.24x = 344,113.61
  5. Step 5: Solve for x
    x = 344,113.61/633.24
  6. Step 6: Final answer
    x = 543.42

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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.