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Finding the Fourth Proportional to 553.91, 764.20 and 344.25

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Solution

The fourth proportional to 553.91, 764.20 and 344.25 is: 474.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.91 : 764.20 = 344.25 : x
  2. Step 2: Convert to fraction form
    553.91/764.20 = 344.25/x
  3. Step 3: Cross multiply
    553.91x = 764.20 × 344.25
  4. Step 4: Simplify right side
    553.91x = 263,075.85
  5. Step 5: Solve for x
    x = 263,075.85/553.91
  6. Step 6: Final answer
    x = 474.94

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.