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Finding the Fourth Proportional to 725.01, 999.51 and 619.64

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Solution

The fourth proportional to 725.01, 999.51 and 619.64 is: 854.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.01 : 999.51 = 619.64 : x
  2. Step 2: Convert to fraction form
    725.01/999.51 = 619.64/x
  3. Step 3: Cross multiply
    725.01x = 999.51 × 619.64
  4. Step 4: Simplify right side
    725.01x = 619,331.38
  5. Step 5: Solve for x
    x = 619,331.38/725.01
  6. Step 6: Final answer
    x = 854.24

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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.