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Finding the Fourth Proportional to 394.92, 543.60 and 358.92

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Solution

The fourth proportional to 394.92, 543.60 and 358.92 is: 494.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.92 : 543.60 = 358.92 : x
  2. Step 2: Convert to fraction form
    394.92/543.60 = 358.92/x
  3. Step 3: Cross multiply
    394.92x = 543.60 × 358.92
  4. Step 4: Simplify right side
    394.92x = 195,108.91
  5. Step 5: Solve for x
    x = 195,108.91/394.92
  6. Step 6: Final answer
    x = 494.05

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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.