Home / 2,689.29-3,711.47-1,570.77

Finding the Fourth Proportional to 2,689.29, 3,711.47 and 1,570.77

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Solution

The fourth proportional to 2,689.29, 3,711.47 and 1,570.77 is: 2,167.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.29 : 3,711.47 = 1,570.77 : x
  2. Step 2: Convert to fraction form
    2,689.29/3,711.47 = 1,570.77/x
  3. Step 3: Cross multiply
    2,689.29x = 3,711.47 × 1,570.77
  4. Step 4: Simplify right side
    2,689.29x = 5,829,857.88
  5. Step 5: Solve for x
    x = 5,829,857.88/2,689.29
  6. Step 6: Final answer
    x = 2,167.81

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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.