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Finding the Fourth Proportional to 370.23, 555.36 and 139.14

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Solution

The fourth proportional to 370.23, 555.36 and 139.14 is: 208.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.23 : 555.36 = 139.14 : x
  2. Step 2: Convert to fraction form
    370.23/555.36 = 139.14/x
  3. Step 3: Cross multiply
    370.23x = 555.36 × 139.14
  4. Step 4: Simplify right side
    370.23x = 77,272.79
  5. Step 5: Solve for x
    x = 77,272.79/370.23
  6. Step 6: Final answer
    x = 208.72

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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.