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Finding the Fourth Proportional to 342.96, 515.88 and 309.84

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Solution

The fourth proportional to 342.96, 515.88 and 309.84 is: 466.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.96 : 515.88 = 309.84 : x
  2. Step 2: Convert to fraction form
    342.96/515.88 = 309.84/x
  3. Step 3: Cross multiply
    342.96x = 515.88 × 309.84
  4. Step 4: Simplify right side
    342.96x = 159,840.26
  5. Step 5: Solve for x
    x = 159,840.26/342.96
  6. Step 6: Final answer
    x = 466.06

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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.