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Finding the Fourth Proportional to 723.78, 999.06 and 428.94

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Solution

The fourth proportional to 723.78, 999.06 and 428.94 is: 592.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.78 : 999.06 = 428.94 : x
  2. Step 2: Convert to fraction form
    723.78/999.06 = 428.94/x
  3. Step 3: Cross multiply
    723.78x = 999.06 × 428.94
  4. Step 4: Simplify right side
    723.78x = 428,536.80
  5. Step 5: Solve for x
    x = 428,536.80/723.78
  6. Step 6: Final answer
    x = 592.08

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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.