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Finding the Fourth Proportional to 383.85, 528.55 and 348.66

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Solution

The fourth proportional to 383.85, 528.55 and 348.66 is: 480.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.85 : 528.55 = 348.66 : x
  2. Step 2: Convert to fraction form
    383.85/528.55 = 348.66/x
  3. Step 3: Cross multiply
    383.85x = 528.55 × 348.66
  4. Step 4: Simplify right side
    383.85x = 184,284.24
  5. Step 5: Solve for x
    x = 184,284.24/383.85
  6. Step 6: Final answer
    x = 480.09

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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.