Home / 1,578.17-2,175.61-1,129.92

Finding the Fourth Proportional to 1,578.17, 2,175.61 and 1,129.92

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Solution

The fourth proportional to 1,578.17, 2,175.61 and 1,129.92 is: 1,557.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.17 : 2,175.61 = 1,129.92 : x
  2. Step 2: Convert to fraction form
    1,578.17/2,175.61 = 1,129.92/x
  3. Step 3: Cross multiply
    1,578.17x = 2,175.61 × 1,129.92
  4. Step 4: Simplify right side
    1,578.17x = 2,458,254.37
  5. Step 5: Solve for x
    x = 2,458,254.37/1,578.17
  6. Step 6: Final answer
    x = 1,557.66

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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.