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Finding the Fourth Proportional to 1,578.75, 2,178.69 and 880.14

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Solution

The fourth proportional to 1,578.75, 2,178.69 and 880.14 is: 1,214.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.75 : 2,178.69 = 880.14 : x
  2. Step 2: Convert to fraction form
    1,578.75/2,178.69 = 880.14/x
  3. Step 3: Cross multiply
    1,578.75x = 2,178.69 × 880.14
  4. Step 4: Simplify right side
    1,578.75x = 1,917,552.22
  5. Step 5: Solve for x
    x = 1,917,552.22/1,578.75
  6. Step 6: Final answer
    x = 1,214.60

Related Problems

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Half scale
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Double scale
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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.