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Finding the Fourth Proportional to 633.42, 874.80 and 502.20

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Solution

The fourth proportional to 633.42, 874.80 and 502.20 is: 693.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.42 : 874.80 = 502.20 : x
  2. Step 2: Convert to fraction form
    633.42/874.80 = 502.20/x
  3. Step 3: Cross multiply
    633.42x = 874.80 × 502.20
  4. Step 4: Simplify right side
    633.42x = 439,324.56
  5. Step 5: Solve for x
    x = 439,324.56/633.42
  6. Step 6: Final answer
    x = 693.58

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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.