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Finding the Fourth Proportional to 788.72, 1,088.12 and 523.29

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Solution

The fourth proportional to 788.72, 1,088.12 and 523.29 is: 721.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.72 : 1,088.12 = 523.29 : x
  2. Step 2: Convert to fraction form
    788.72/1,088.12 = 523.29/x
  3. Step 3: Cross multiply
    788.72x = 1,088.12 × 523.29
  4. Step 4: Simplify right side
    788.72x = 569,399.70
  5. Step 5: Solve for x
    x = 569,399.70/788.72
  6. Step 6: Final answer
    x = 721.93

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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.