Home / 1,921.61-2,650.99-1,175.60

Finding the Fourth Proportional to 1,921.61, 2,650.99 and 1,175.60

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Solution

The fourth proportional to 1,921.61, 2,650.99 and 1,175.60 is: 1,621.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.61 : 2,650.99 = 1,175.60 : x
  2. Step 2: Convert to fraction form
    1,921.61/2,650.99 = 1,175.60/x
  3. Step 3: Cross multiply
    1,921.61x = 2,650.99 × 1,175.60
  4. Step 4: Simplify right side
    1,921.61x = 3,116,503.84
  5. Step 5: Solve for x
    x = 3,116,503.84/1,921.61
  6. Step 6: Final answer
    x = 1,621.82

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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.