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Finding the Fourth Proportional to 370.33, 555.19 and 139.18

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Solution

The fourth proportional to 370.33, 555.19 and 139.18 is: 208.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.33 : 555.19 = 139.18 : x
  2. Step 2: Convert to fraction form
    370.33/555.19 = 139.18/x
  3. Step 3: Cross multiply
    370.33x = 555.19 × 139.18
  4. Step 4: Simplify right side
    370.33x = 77,271.34
  5. Step 5: Solve for x
    x = 77,271.34/370.33
  6. Step 6: Final answer
    x = 208.66

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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.