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Finding the Fourth Proportional to 579.12, 799.19 and 317.15

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Solution

The fourth proportional to 579.12, 799.19 and 317.15 is: 437.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.12 : 799.19 = 317.15 : x
  2. Step 2: Convert to fraction form
    579.12/799.19 = 317.15/x
  3. Step 3: Cross multiply
    579.12x = 799.19 × 317.15
  4. Step 4: Simplify right side
    579.12x = 253,457.53
  5. Step 5: Solve for x
    x = 253,457.53/579.12
  6. Step 6: Final answer
    x = 437.66

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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.