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Finding the Fourth Proportional to 601.36, 828.66 and 391.30

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Solution

The fourth proportional to 601.36, 828.66 and 391.30 is: 539.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.36 : 828.66 = 391.30 : x
  2. Step 2: Convert to fraction form
    601.36/828.66 = 391.30/x
  3. Step 3: Cross multiply
    601.36x = 828.66 × 391.30
  4. Step 4: Simplify right side
    601.36x = 324,254.05
  5. Step 5: Solve for x
    x = 324,254.05/601.36
  6. Step 6: Final answer
    x = 539.20

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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.