Home / 1,913.32-2,640.30-1,116.79

Finding the Fourth Proportional to 1,913.32, 2,640.30 and 1,116.79

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Solution

The fourth proportional to 1,913.32, 2,640.30 and 1,116.79 is: 1,541.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.32 : 2,640.30 = 1,116.79 : x
  2. Step 2: Convert to fraction form
    1,913.32/2,640.30 = 1,116.79/x
  3. Step 3: Cross multiply
    1,913.32x = 2,640.30 × 1,116.79
  4. Step 4: Simplify right side
    1,913.32x = 2,948,649.85
  5. Step 5: Solve for x
    x = 2,948,649.85/1,913.32
  6. Step 6: Final answer
    x = 1,541.12

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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.