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Finding the Fourth Proportional to 345.53, 518.31 and 102.07

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Solution

The fourth proportional to 345.53, 518.31 and 102.07 is: 153.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.53 : 518.31 = 102.07 : x
  2. Step 2: Convert to fraction form
    345.53/518.31 = 102.07/x
  3. Step 3: Cross multiply
    345.53x = 518.31 × 102.07
  4. Step 4: Simplify right side
    345.53x = 52,903.90
  5. Step 5: Solve for x
    x = 52,903.90/345.53
  6. Step 6: Final answer
    x = 153.11

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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.