Home / 1,988.08-2,740.94-1,711.28

Finding the Fourth Proportional to 1,988.08, 2,740.94 and 1,711.28

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Solution

The fourth proportional to 1,988.08, 2,740.94 and 1,711.28 is: 2,359.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.08 : 2,740.94 = 1,711.28 : x
  2. Step 2: Convert to fraction form
    1,988.08/2,740.94 = 1,711.28/x
  3. Step 3: Cross multiply
    1,988.08x = 2,740.94 × 1,711.28
  4. Step 4: Simplify right side
    1,988.08x = 4,690,520.52
  5. Step 5: Solve for x
    x = 4,690,520.52/1,988.08
  6. Step 6: Final answer
    x = 2,359.32

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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.