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Finding the Fourth Proportional to 723.96, 999.61 and 475.90

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Solution

The fourth proportional to 723.96, 999.61 and 475.90 is: 657.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.96 : 999.61 = 475.90 : x
  2. Step 2: Convert to fraction form
    723.96/999.61 = 475.90/x
  3. Step 3: Cross multiply
    723.96x = 999.61 × 475.90
  4. Step 4: Simplify right side
    723.96x = 475,710.71
  5. Step 5: Solve for x
    x = 475,710.71/723.96
  6. Step 6: Final answer
    x = 657.10

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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.