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Finding the Fourth Proportional to 600.26, 828.08 and 390.42

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Solution

The fourth proportional to 600.26, 828.08 and 390.42 is: 538.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    600.26 : 828.08 = 390.42 : x
  2. Step 2: Convert to fraction form
    600.26/828.08 = 390.42/x
  3. Step 3: Cross multiply
    600.26x = 828.08 × 390.42
  4. Step 4: Simplify right side
    600.26x = 323,298.99
  5. Step 5: Solve for x
    x = 323,298.99/600.26
  6. Step 6: Final answer
    x = 538.60

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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.