Home / 1,979.59-2,731.21-1,316.55

Finding the Fourth Proportional to 1,979.59, 2,731.21 and 1,316.55

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Solution

The fourth proportional to 1,979.59, 2,731.21 and 1,316.55 is: 1,816.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.59 : 2,731.21 = 1,316.55 : x
  2. Step 2: Convert to fraction form
    1,979.59/2,731.21 = 1,316.55/x
  3. Step 3: Cross multiply
    1,979.59x = 2,731.21 × 1,316.55
  4. Step 4: Simplify right side
    1,979.59x = 3,595,774.53
  5. Step 5: Solve for x
    x = 3,595,774.53/1,979.59
  6. Step 6: Final answer
    x = 1,816.42

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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.