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Finding the Fourth Proportional to 370.51, 555.96 and 139.56

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Solution

The fourth proportional to 370.51, 555.96 and 139.56 is: 209.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.51 : 555.96 = 139.56 : x
  2. Step 2: Convert to fraction form
    370.51/555.96 = 139.56/x
  3. Step 3: Cross multiply
    370.51x = 555.96 × 139.56
  4. Step 4: Simplify right side
    370.51x = 77,589.78
  5. Step 5: Solve for x
    x = 77,589.78/370.51
  6. Step 6: Final answer
    x = 209.41

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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.