Home / 2,979.06-4,109.95-1,916.69

Finding the Fourth Proportional to 2,979.06, 4,109.95 and 1,916.69

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Solution

The fourth proportional to 2,979.06, 4,109.95 and 1,916.69 is: 2,644.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.06 : 4,109.95 = 1,916.69 : x
  2. Step 2: Convert to fraction form
    2,979.06/4,109.95 = 1,916.69/x
  3. Step 3: Cross multiply
    2,979.06x = 4,109.95 × 1,916.69
  4. Step 4: Simplify right side
    2,979.06x = 7,877,500.07
  5. Step 5: Solve for x
    x = 7,877,500.07/2,979.06
  6. Step 6: Final answer
    x = 2,644.29

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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.