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Finding the Fourth Proportional to 1,755.22, 2,631.81 and 715.72

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Solution

The fourth proportional to 1,755.22, 2,631.81 and 715.72 is: 1,073.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755.22 : 2,631.81 = 715.72 : x
  2. Step 2: Convert to fraction form
    1,755.22/2,631.81 = 715.72/x
  3. Step 3: Cross multiply
    1,755.22x = 2,631.81 × 715.72
  4. Step 4: Simplify right side
    1,755.22x = 1,883,639.05
  5. Step 5: Solve for x
    x = 1,883,639.05/1,755.22
  6. Step 6: Final answer
    x = 1,073.16

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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.