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Finding the Fourth Proportional to 370.42, 555.86 and 208.22

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Solution

The fourth proportional to 370.42, 555.86 and 208.22 is: 312.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.42 : 555.86 = 208.22 : x
  2. Step 2: Convert to fraction form
    370.42/555.86 = 208.22/x
  3. Step 3: Cross multiply
    370.42x = 555.86 × 208.22
  4. Step 4: Simplify right side
    370.42x = 115,742.04
  5. Step 5: Solve for x
    x = 115,742.04/370.42
  6. Step 6: Final answer
    x = 312.46

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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.