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Finding the Fourth Proportional to 600.71, 828.68 and 390.83

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Solution

The fourth proportional to 600.71, 828.68 and 390.83 is: 539.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    600.71 : 828.68 = 390.83 : x
  2. Step 2: Convert to fraction form
    600.71/828.68 = 390.83/x
  3. Step 3: Cross multiply
    600.71x = 828.68 × 390.83
  4. Step 4: Simplify right side
    600.71x = 323,866.91
  5. Step 5: Solve for x
    x = 323,866.91/600.71
  6. Step 6: Final answer
    x = 539.14

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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.