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Finding the Fourth Proportional to 1,699.80, 2,552.04 and 878.64

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Solution

The fourth proportional to 1,699.80, 2,552.04 and 878.64 is: 1,319.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,699.80 : 2,552.04 = 878.64 : x
  2. Step 2: Convert to fraction form
    1,699.80/2,552.04 = 878.64/x
  3. Step 3: Cross multiply
    1,699.80x = 2,552.04 × 878.64
  4. Step 4: Simplify right side
    1,699.80x = 2,242,324.43
  5. Step 5: Solve for x
    x = 2,242,324.43/1,699.80
  6. Step 6: Final answer
    x = 1,319.17

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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.