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Finding the Fourth Proportional to 575.76, 863.90 and 319.26

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Solution

The fourth proportional to 575.76, 863.90 and 319.26 is: 479.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.76 : 863.90 = 319.26 : x
  2. Step 2: Convert to fraction form
    575.76/863.90 = 319.26/x
  3. Step 3: Cross multiply
    575.76x = 863.90 × 319.26
  4. Step 4: Simplify right side
    575.76x = 275,808.71
  5. Step 5: Solve for x
    x = 275,808.71/575.76
  6. Step 6: Final answer
    x = 479.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.