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Finding the Fourth Proportional to 579.19, 799.29 and 317.20

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Solution

The fourth proportional to 579.19, 799.29 and 317.20 is: 437.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.19 : 799.29 = 317.20 : x
  2. Step 2: Convert to fraction form
    579.19/799.29 = 317.20/x
  3. Step 3: Cross multiply
    579.19x = 799.29 × 317.20
  4. Step 4: Simplify right side
    579.19x = 253,534.79
  5. Step 5: Solve for x
    x = 253,534.79/579.19
  6. Step 6: Final answer
    x = 437.74

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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.