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Finding the Fourth Proportional to 725.00, 1,000.10 and 430.21

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Solution

The fourth proportional to 725.00, 1,000.10 and 430.21 is: 593.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.00 : 1,000.10 = 430.21 : x
  2. Step 2: Convert to fraction form
    725.00/1,000.10 = 430.21/x
  3. Step 3: Cross multiply
    725.00x = 1,000.10 × 430.21
  4. Step 4: Simplify right side
    725.00x = 430,252.93
  5. Step 5: Solve for x
    x = 430,252.93/725.00
  6. Step 6: Final answer
    x = 593.45

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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.