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Finding the Fourth Proportional to 370.05, 555.15 and 138.93

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Solution

The fourth proportional to 370.05, 555.15 and 138.93 is: 208.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.05 : 555.15 = 138.93 : x
  2. Step 2: Convert to fraction form
    370.05/555.15 = 138.93/x
  3. Step 3: Cross multiply
    370.05x = 555.15 × 138.93
  4. Step 4: Simplify right side
    370.05x = 77,126.29
  5. Step 5: Solve for x
    x = 77,126.29/370.05
  6. Step 6: Final answer
    x = 208.42

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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.