Home / 1,989.08-2,742.32-1,712.28

Finding the Fourth Proportional to 1,989.08, 2,742.32 and 1,712.28

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Solution

The fourth proportional to 1,989.08, 2,742.32 and 1,712.28 is: 2,360.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.08 : 2,742.32 = 1,712.28 : x
  2. Step 2: Convert to fraction form
    1,989.08/2,742.32 = 1,712.28/x
  3. Step 3: Cross multiply
    1,989.08x = 2,742.32 × 1,712.28
  4. Step 4: Simplify right side
    1,989.08x = 4,695,619.69
  5. Step 5: Solve for x
    x = 4,695,619.69/1,989.08
  6. Step 6: Final answer
    x = 2,360.70

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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.