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Finding the Fourth Proportional to 1,299.56, 1,792.24 and 774.68

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Solution

The fourth proportional to 1,299.56, 1,792.24 and 774.68 is: 1,068.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.56 : 1,792.24 = 774.68 : x
  2. Step 2: Convert to fraction form
    1,299.56/1,792.24 = 774.68/x
  3. Step 3: Cross multiply
    1,299.56x = 1,792.24 × 774.68
  4. Step 4: Simplify right side
    1,299.56x = 1,388,412.48
  5. Step 5: Solve for x
    x = 1,388,412.48/1,299.56
  6. Step 6: Final answer
    x = 1,068.37

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1.5x scale

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.