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Finding the Fourth Proportional to 725.91, 1,088.40 and 401.51

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Solution

The fourth proportional to 725.91, 1,088.40 and 401.51 is: 602.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.91 : 1,088.40 = 401.51 : x
  2. Step 2: Convert to fraction form
    725.91/1,088.40 = 401.51/x
  3. Step 3: Cross multiply
    725.91x = 1,088.40 × 401.51
  4. Step 4: Simplify right side
    725.91x = 436,998.04
  5. Step 5: Solve for x
    x = 436,998.04/725.91
  6. Step 6: Final answer
    x = 602.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.