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Finding the Fourth Proportional to 245.15, 368.07 and 142.62

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Solution

The fourth proportional to 245.15, 368.07 and 142.62 is: 214.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.15 : 368.07 = 142.62 : x
  2. Step 2: Convert to fraction form
    245.15/368.07 = 142.62/x
  3. Step 3: Cross multiply
    245.15x = 368.07 × 142.62
  4. Step 4: Simplify right side
    245.15x = 52,494.14
  5. Step 5: Solve for x
    x = 52,494.14/245.15
  6. Step 6: Final answer
    x = 214.14

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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.