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Finding the Fourth Proportional to 555.10, 765.90 and 322.24

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Solution

The fourth proportional to 555.10, 765.90 and 322.24 is: 444.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.10 : 765.90 = 322.24 : x
  2. Step 2: Convert to fraction form
    555.10/765.90 = 322.24/x
  3. Step 3: Cross multiply
    555.10x = 765.90 × 322.24
  4. Step 4: Simplify right side
    555.10x = 246,803.62
  5. Step 5: Solve for x
    x = 246,803.62/555.10
  6. Step 6: Final answer
    x = 444.61

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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.