Home / 1,418.40-2,117.26-1,355.28

Finding the Fourth Proportional to 1,418.40, 2,117.26 and 1,355.28

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Solution

The fourth proportional to 1,418.40, 2,117.26 and 1,355.28 is: 2,023.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.40 : 2,117.26 = 1,355.28 : x
  2. Step 2: Convert to fraction form
    1,418.40/2,117.26 = 1,355.28/x
  3. Step 3: Cross multiply
    1,418.40x = 2,117.26 × 1,355.28
  4. Step 4: Simplify right side
    1,418.40x = 2,869,480.13
  5. Step 5: Solve for x
    x = 2,869,480.13/1,418.40
  6. Step 6: Final answer
    x = 2,023.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.