Home / 2,166.40-2,989.63-1,171.68

Finding the Fourth Proportional to 2,166.40, 2,989.63 and 1,171.68

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Solution

The fourth proportional to 2,166.40, 2,989.63 and 1,171.68 is: 1,616.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.40 : 2,989.63 = 1,171.68 : x
  2. Step 2: Convert to fraction form
    2,166.40/2,989.63 = 1,171.68/x
  3. Step 3: Cross multiply
    2,166.40x = 2,989.63 × 1,171.68
  4. Step 4: Simplify right side
    2,166.40x = 3,502,877.73
  5. Step 5: Solve for x
    x = 3,502,877.73/2,166.40
  6. Step 6: Final answer
    x = 1,616.91

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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.