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Finding the Fourth Proportional to 725.10, 999.73 and 430.26

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Solution

The fourth proportional to 725.10, 999.73 and 430.26 is: 593.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.10 : 999.73 = 430.26 : x
  2. Step 2: Convert to fraction form
    725.10/999.73 = 430.26/x
  3. Step 3: Cross multiply
    725.10x = 999.73 × 430.26
  4. Step 4: Simplify right side
    725.10x = 430,143.83
  5. Step 5: Solve for x
    x = 430,143.83/725.10
  6. Step 6: Final answer
    x = 593.22

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1.5x scale

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.