Home / 1,979.40-2,966.67-1,111.89

Finding the Fourth Proportional to 1,979.40, 2,966.67 and 1,111.89

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Solution

The fourth proportional to 1,979.40, 2,966.67 and 1,111.89 is: 1,666.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.40 : 2,966.67 = 1,111.89 : x
  2. Step 2: Convert to fraction form
    1,979.40/2,966.67 = 1,111.89/x
  3. Step 3: Cross multiply
    1,979.40x = 2,966.67 × 1,111.89
  4. Step 4: Simplify right side
    1,979.40x = 3,298,610.71
  5. Step 5: Solve for x
    x = 3,298,610.71/1,979.40
  6. Step 6: Final answer
    x = 1,666.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.