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Finding the Fourth Proportional to 580.14, 799.40 and 393.64

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Solution

The fourth proportional to 580.14, 799.40 and 393.64 is: 542.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.14 : 799.40 = 393.64 : x
  2. Step 2: Convert to fraction form
    580.14/799.40 = 393.64/x
  3. Step 3: Cross multiply
    580.14x = 799.40 × 393.64
  4. Step 4: Simplify right side
    580.14x = 314,674.80
  5. Step 5: Solve for x
    x = 314,674.80/580.14
  6. Step 6: Final answer
    x = 542.41

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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.