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Finding the Fourth Proportional to 515, 709.98 and 367.98

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Solution

The fourth proportional to 515, 709.98 and 367.98 is: 507.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    515 : 709.98 = 367.98 : x
  2. Step 2: Convert to fraction form
    515/709.98 = 367.98/x
  3. Step 3: Cross multiply
    515x = 709.98 × 367.98
  4. Step 4: Simplify right side
    515x = 261,258.44
  5. Step 5: Solve for x
    x = 261,258.44/515
  6. Step 6: Final answer
    x = 507.30

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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.