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Finding the Fourth Proportional to 555.22, 766.23 and 322.42

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Solution

The fourth proportional to 555.22, 766.23 and 322.42 is: 444.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.22 : 766.23 = 322.42 : x
  2. Step 2: Convert to fraction form
    555.22/766.23 = 322.42/x
  3. Step 3: Cross multiply
    555.22x = 766.23 × 322.42
  4. Step 4: Simplify right side
    555.22x = 247,047.88
  5. Step 5: Solve for x
    x = 247,047.88/555.22
  6. Step 6: Final answer
    x = 444.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.