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Finding the Fourth Proportional to 1,792.26, 2,689.16 and 971.12

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Solution

The fourth proportional to 1,792.26, 2,689.16 and 971.12 is: 1,457.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.26 : 2,689.16 = 971.12 : x
  2. Step 2: Convert to fraction form
    1,792.26/2,689.16 = 971.12/x
  3. Step 3: Cross multiply
    1,792.26x = 2,689.16 × 971.12
  4. Step 4: Simplify right side
    1,792.26x = 2,611,497.06
  5. Step 5: Solve for x
    x = 2,611,497.06/1,792.26
  6. Step 6: Final answer
    x = 1,457.10

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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.