Home / 2,920.32-4,030.08-1,989.12

Finding the Fourth Proportional to 2,920.32, 4,030.08 and 1,989.12

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Solution

The fourth proportional to 2,920.32, 4,030.08 and 1,989.12 is: 2,745.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.32 : 4,030.08 = 1,989.12 : x
  2. Step 2: Convert to fraction form
    2,920.32/4,030.08 = 1,989.12/x
  3. Step 3: Cross multiply
    2,920.32x = 4,030.08 × 1,989.12
  4. Step 4: Simplify right side
    2,920.32x = 8,016,312.73
  5. Step 5: Solve for x
    x = 8,016,312.73/2,920.32
  6. Step 6: Final answer
    x = 2,745.01

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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.