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Finding the Fourth Proportional to 399.47, 594.42 and 398.10

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Solution

The fourth proportional to 399.47, 594.42 and 398.10 is: 592.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.47 : 594.42 = 398.10 : x
  2. Step 2: Convert to fraction form
    399.47/594.42 = 398.10/x
  3. Step 3: Cross multiply
    399.47x = 594.42 × 398.10
  4. Step 4: Simplify right side
    399.47x = 236,639.90
  5. Step 5: Solve for x
    x = 236,639.90/399.47
  6. Step 6: Final answer
    x = 592.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.