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Finding the Fourth Proportional to 579.15, 799.20 and 317.18

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Solution

The fourth proportional to 579.15, 799.20 and 317.18 is: 437.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.15 : 799.20 = 317.18 : x
  2. Step 2: Convert to fraction form
    579.15/799.20 = 317.18/x
  3. Step 3: Cross multiply
    579.15x = 799.20 × 317.18
  4. Step 4: Simplify right side
    579.15x = 253,492.25
  5. Step 5: Solve for x
    x = 253,492.25/579.15
  6. Step 6: Final answer
    x = 437.70

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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.