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Finding the Fourth Proportional to 579.81, 799.62 and 380.76

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Solution

The fourth proportional to 579.81, 799.62 and 380.76 is: 525.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.81 : 799.62 = 380.76 : x
  2. Step 2: Convert to fraction form
    579.81/799.62 = 380.76/x
  3. Step 3: Cross multiply
    579.81x = 799.62 × 380.76
  4. Step 4: Simplify right side
    579.81x = 304,463.31
  5. Step 5: Solve for x
    x = 304,463.31/579.81
  6. Step 6: Final answer
    x = 525.11

Related Problems

Find fourth proportional to 289.91, 399.81 and 190.38
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Double scale
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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.