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Finding the Fourth Proportional to 1,578.69, 2,178.66 and 880.07

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Solution

The fourth proportional to 1,578.69, 2,178.66 and 880.07 is: 1,214.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.69 : 2,178.66 = 880.07 : x
  2. Step 2: Convert to fraction form
    1,578.69/2,178.66 = 880.07/x
  3. Step 3: Cross multiply
    1,578.69x = 2,178.66 × 880.07
  4. Step 4: Simplify right side
    1,578.69x = 1,917,358.01
  5. Step 5: Solve for x
    x = 1,917,358.01/1,578.69
  6. Step 6: Final answer
    x = 1,214.52

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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.