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Finding the Fourth Proportional to 345.55, 518.26 and 102.08

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Solution

The fourth proportional to 345.55, 518.26 and 102.08 is: 153.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.55 : 518.26 = 102.08 : x
  2. Step 2: Convert to fraction form
    345.55/518.26 = 102.08/x
  3. Step 3: Cross multiply
    345.55x = 518.26 × 102.08
  4. Step 4: Simplify right side
    345.55x = 52,903.98
  5. Step 5: Solve for x
    x = 52,903.98/345.55
  6. Step 6: Final answer
    x = 153.10

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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.