Home / 1,979.42-2,731.32-1,140.05

Finding the Fourth Proportional to 1,979.42, 2,731.32 and 1,140.05

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Solution

The fourth proportional to 1,979.42, 2,731.32 and 1,140.05 is: 1,573.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.42 : 2,731.32 = 1,140.05 : x
  2. Step 2: Convert to fraction form
    1,979.42/2,731.32 = 1,140.05/x
  3. Step 3: Cross multiply
    1,979.42x = 2,731.32 × 1,140.05
  4. Step 4: Simplify right side
    1,979.42x = 3,113,848.19
  5. Step 5: Solve for x
    x = 3,113,848.19/1,979.42
  6. Step 6: Final answer
    x = 1,573.12

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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.