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Finding the Fourth Proportional to 558.08, 769.77 and 383.12

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Solution

The fourth proportional to 558.08, 769.77 and 383.12 is: 528.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.08 : 769.77 = 383.12 : x
  2. Step 2: Convert to fraction form
    558.08/769.77 = 383.12/x
  3. Step 3: Cross multiply
    558.08x = 769.77 × 383.12
  4. Step 4: Simplify right side
    558.08x = 294,914.28
  5. Step 5: Solve for x
    x = 294,914.28/558.08
  6. Step 6: Final answer
    x = 528.44

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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.