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Finding the Fourth Proportional to 395.43, 545.76 and 383.34

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Solution

The fourth proportional to 395.43, 545.76 and 383.34 is: 529.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.43 : 545.76 = 383.34 : x
  2. Step 2: Convert to fraction form
    395.43/545.76 = 383.34/x
  3. Step 3: Cross multiply
    395.43x = 545.76 × 383.34
  4. Step 4: Simplify right side
    395.43x = 209,208.54
  5. Step 5: Solve for x
    x = 209,208.54/395.43
  6. Step 6: Final answer
    x = 529.06

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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.