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Finding the Fourth Proportional to 1,792.80, 2,688.39 and 559.91

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Solution

The fourth proportional to 1,792.80, 2,688.39 and 559.91 is: 839.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.80 : 2,688.39 = 559.91 : x
  2. Step 2: Convert to fraction form
    1,792.80/2,688.39 = 559.91/x
  3. Step 3: Cross multiply
    1,792.80x = 2,688.39 × 559.91
  4. Step 4: Simplify right side
    1,792.80x = 1,505,263.17
  5. Step 5: Solve for x
    x = 1,505,263.17/1,792.80
  6. Step 6: Final answer
    x = 839.62

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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.