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Finding the Fourth Proportional to 723.05, 998.21 and 554.69

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Solution

The fourth proportional to 723.05, 998.21 and 554.69 is: 765.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.05 : 998.21 = 554.69 : x
  2. Step 2: Convert to fraction form
    723.05/998.21 = 554.69/x
  3. Step 3: Cross multiply
    723.05x = 998.21 × 554.69
  4. Step 4: Simplify right side
    723.05x = 553,689.34
  5. Step 5: Solve for x
    x = 553,689.34/723.05
  6. Step 6: Final answer
    x = 765.77

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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.