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Finding the Fourth Proportional to 555.07, 765.97 and 322.20

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Solution

The fourth proportional to 555.07, 765.97 and 322.20 is: 444.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.07 : 765.97 = 322.20 : x
  2. Step 2: Convert to fraction form
    555.07/765.97 = 322.20/x
  3. Step 3: Cross multiply
    555.07x = 765.97 × 322.20
  4. Step 4: Simplify right side
    555.07x = 246,795.53
  5. Step 5: Solve for x
    x = 246,795.53/555.07
  6. Step 6: Final answer
    x = 444.62

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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.