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Finding the Fourth Proportional to 598.68, 826.06 and 391.64

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Solution

The fourth proportional to 598.68, 826.06 and 391.64 is: 540.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    598.68 : 826.06 = 391.64 : x
  2. Step 2: Convert to fraction form
    598.68/826.06 = 391.64/x
  3. Step 3: Cross multiply
    598.68x = 826.06 × 391.64
  4. Step 4: Simplify right side
    598.68x = 323,518.14
  5. Step 5: Solve for x
    x = 323,518.14/598.68
  6. Step 6: Final answer
    x = 540.39

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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.