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Finding the Fourth Proportional to 599.91, 828.03 and 390.61

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Solution

The fourth proportional to 599.91, 828.03 and 390.61 is: 539.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    599.91 : 828.03 = 390.61 : x
  2. Step 2: Convert to fraction form
    599.91/828.03 = 390.61/x
  3. Step 3: Cross multiply
    599.91x = 828.03 × 390.61
  4. Step 4: Simplify right side
    599.91x = 323,434.00
  5. Step 5: Solve for x
    x = 323,434.00/599.91
  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.