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Finding the Fourth Proportional to 515.15, 772.34 and 341.60

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Solution

The fourth proportional to 515.15, 772.34 and 341.60 is: 512.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.15 : 772.34 = 341.60 : x
  2. Step 2: Convert to fraction form
    515.15/772.34 = 341.60/x
  3. Step 3: Cross multiply
    515.15x = 772.34 × 341.60
  4. Step 4: Simplify right side
    515.15x = 263,828.34
  5. Step 5: Solve for x
    x = 263,828.34/515.15
  6. Step 6: Final answer
    x = 512.14

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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.