Home / 3,120.76-4,681.86-1,661.32

Finding the Fourth Proportional to 3,120.76, 4,681.86 and 1,661.32

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Solution

The fourth proportional to 3,120.76, 4,681.86 and 1,661.32 is: 2,492.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.76 : 4,681.86 = 1,661.32 : x
  2. Step 2: Convert to fraction form
    3,120.76/4,681.86 = 1,661.32/x
  3. Step 3: Cross multiply
    3,120.76x = 4,681.86 × 1,661.32
  4. Step 4: Simplify right side
    3,120.76x = 7,778,067.66
  5. Step 5: Solve for x
    x = 7,778,067.66/3,120.76
  6. Step 6: Final answer
    x = 2,492.36

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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.