Home / 1,670.76-2,508.39-1,125.45

Finding the Fourth Proportional to 1,670.76, 2,508.39 and 1,125.45

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Solution

The fourth proportional to 1,670.76, 2,508.39 and 1,125.45 is: 1,689.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.76 : 2,508.39 = 1,125.45 : x
  2. Step 2: Convert to fraction form
    1,670.76/2,508.39 = 1,125.45/x
  3. Step 3: Cross multiply
    1,670.76x = 2,508.39 × 1,125.45
  4. Step 4: Simplify right side
    1,670.76x = 2,823,067.53
  5. Step 5: Solve for x
    x = 2,823,067.53/1,670.76
  6. Step 6: Final answer
    x = 1,689.69

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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.