Home / 1,403.16-2,111.58-1,268.88

Finding the Fourth Proportional to 1,403.16, 2,111.58 and 1,268.88

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Solution

The fourth proportional to 1,403.16, 2,111.58 and 1,268.88 is: 1,909.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.16 : 2,111.58 = 1,268.88 : x
  2. Step 2: Convert to fraction form
    1,403.16/2,111.58 = 1,268.88/x
  3. Step 3: Cross multiply
    1,403.16x = 2,111.58 × 1,268.88
  4. Step 4: Simplify right side
    1,403.16x = 2,679,341.63
  5. Step 5: Solve for x
    x = 2,679,341.63/1,403.16
  6. Step 6: Final answer
    x = 1,909.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.