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Finding the Fourth Proportional to 370.20, 555.03 and 139.07

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Solution

The fourth proportional to 370.20, 555.03 and 139.07 is: 208.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.20 : 555.03 = 139.07 : x
  2. Step 2: Convert to fraction form
    370.20/555.03 = 139.07/x
  3. Step 3: Cross multiply
    370.20x = 555.03 × 139.07
  4. Step 4: Simplify right side
    370.20x = 77,185.90
  5. Step 5: Solve for x
    x = 77,185.90/370.20
  6. Step 6: Final answer
    x = 208.50

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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.