Home / 2,985.54-4,117.92-1,990.32

Finding the Fourth Proportional to 2,985.54, 4,117.92 and 1,990.32

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Solution

The fourth proportional to 2,985.54, 4,117.92 and 1,990.32 is: 2,745.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.54 : 4,117.92 = 1,990.32 : x
  2. Step 2: Convert to fraction form
    2,985.54/4,117.92 = 1,990.32/x
  3. Step 3: Cross multiply
    2,985.54x = 4,117.92 × 1,990.32
  4. Step 4: Simplify right side
    2,985.54x = 8,195,978.53
  5. Step 5: Solve for x
    x = 8,195,978.53/2,985.54
  6. Step 6: Final answer
    x = 2,745.22

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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.