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Finding the Fourth Proportional to 383.26, 529.10 and 345.91

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Solution

The fourth proportional to 383.26, 529.10 and 345.91 is: 477.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.26 : 529.10 = 345.91 : x
  2. Step 2: Convert to fraction form
    383.26/529.10 = 345.91/x
  3. Step 3: Cross multiply
    383.26x = 529.10 × 345.91
  4. Step 4: Simplify right side
    383.26x = 183,019.25
  5. Step 5: Solve for x
    x = 183,019.25/383.26
  6. Step 6: Final answer
    x = 477.53

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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.