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Finding the Fourth Proportional to 383.17, 528.05 and 345.43

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Solution

The fourth proportional to 383.17, 528.05 and 345.43 is: 476.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.17 : 528.05 = 345.43 : x
  2. Step 2: Convert to fraction form
    383.17/528.05 = 345.43/x
  3. Step 3: Cross multiply
    383.17x = 528.05 × 345.43
  4. Step 4: Simplify right side
    383.17x = 182,405.86
  5. Step 5: Solve for x
    x = 182,405.86/383.17
  6. Step 6: Final answer
    x = 476.05

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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.