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Finding the Fourth Proportional to 2,097.80, 3,145.80 and 1,057.40

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Solution

The fourth proportional to 2,097.80, 3,145.80 and 1,057.40 is: 1,585.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,097.80 : 3,145.80 = 1,057.40 : x
  2. Step 2: Convert to fraction form
    2,097.80/3,145.80 = 1,057.40/x
  3. Step 3: Cross multiply
    2,097.80x = 3,145.80 × 1,057.40
  4. Step 4: Simplify right side
    2,097.80x = 3,326,368.92
  5. Step 5: Solve for x
    x = 3,326,368.92/2,097.80
  6. Step 6: Final answer
    x = 1,585.65

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1.5x scale

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.