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Finding the Fourth Proportional to 1,792.74, 2,689.80 and 697.88

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Solution

The fourth proportional to 1,792.74, 2,689.80 and 697.88 is: 1,047.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.74 : 2,689.80 = 697.88 : x
  2. Step 2: Convert to fraction form
    1,792.74/2,689.80 = 697.88/x
  3. Step 3: Cross multiply
    1,792.74x = 2,689.80 × 697.88
  4. Step 4: Simplify right side
    1,792.74x = 1,877,144.18
  5. Step 5: Solve for x
    x = 1,877,144.18/1,792.74
  6. Step 6: Final answer
    x = 1,047.08

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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.