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Finding the Fourth Proportional to 724.91, 1,000.22 and 430.27

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Solution

The fourth proportional to 724.91, 1,000.22 and 430.27 is: 593.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.91 : 1,000.22 = 430.27 : x
  2. Step 2: Convert to fraction form
    724.91/1,000.22 = 430.27/x
  3. Step 3: Cross multiply
    724.91x = 1,000.22 × 430.27
  4. Step 4: Simplify right side
    724.91x = 430,362.51
  5. Step 5: Solve for x
    x = 430,362.51/724.91
  6. Step 6: Final answer
    x = 593.68

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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.