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Finding the Fourth Proportional to 370.44, 555.36 and 139.32

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Solution

The fourth proportional to 370.44, 555.36 and 139.32 is: 208.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.44 : 555.36 = 139.32 : x
  2. Step 2: Convert to fraction form
    370.44/555.36 = 139.32/x
  3. Step 3: Cross multiply
    370.44x = 555.36 × 139.32
  4. Step 4: Simplify right side
    370.44x = 77,372.76
  5. Step 5: Solve for x
    x = 77,372.76/370.44
  6. Step 6: Final answer
    x = 208.87

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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.