Home / 1,979.50-2,732.23-1,140.30

Finding the Fourth Proportional to 1,979.50, 2,732.23 and 1,140.30

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Solution

The fourth proportional to 1,979.50, 2,732.23 and 1,140.30 is: 1,573.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.50 : 2,732.23 = 1,140.30 : x
  2. Step 2: Convert to fraction form
    1,979.50/2,732.23 = 1,140.30/x
  3. Step 3: Cross multiply
    1,979.50x = 2,732.23 × 1,140.30
  4. Step 4: Simplify right side
    1,979.50x = 3,115,561.87
  5. Step 5: Solve for x
    x = 3,115,561.87/1,979.50
  6. Step 6: Final answer
    x = 1,573.91

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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.