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Finding the Fourth Proportional to 343.56, 515.36 and 87.06

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Solution

The fourth proportional to 343.56, 515.36 and 87.06 is: 130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.56 : 515.36 = 87.06 : x
  2. Step 2: Convert to fraction form
    343.56/515.36 = 87.06/x
  3. Step 3: Cross multiply
    343.56x = 515.36 × 87.06
  4. Step 4: Simplify right side
    343.56x = 44,867.24
  5. Step 5: Solve for x
    x = 44,867.24/343.56
  6. Step 6: Final answer
    x = 130.60

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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.