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Finding the Fourth Proportional to 764.04, 1,146.08 and 331.19

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Solution

The fourth proportional to 764.04, 1,146.08 and 331.19 is: 496.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.04 : 1,146.08 = 331.19 : x
  2. Step 2: Convert to fraction form
    764.04/1,146.08 = 331.19/x
  3. Step 3: Cross multiply
    764.04x = 1,146.08 × 331.19
  4. Step 4: Simplify right side
    764.04x = 379,570.24
  5. Step 5: Solve for x
    x = 379,570.24/764.04
  6. Step 6: Final answer
    x = 496.79

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.