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Finding the Fourth Proportional to 370.32, 555.18 and 139.08

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Solution

The fourth proportional to 370.32, 555.18 and 139.08 is: 208.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.32 : 555.18 = 139.08 : x
  2. Step 2: Convert to fraction form
    370.32/555.18 = 139.08/x
  3. Step 3: Cross multiply
    370.32x = 555.18 × 139.08
  4. Step 4: Simplify right side
    370.32x = 77,214.43
  5. Step 5: Solve for x
    x = 77,214.43/370.32
  6. Step 6: Final answer
    x = 208.51

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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.