Home / 2,431.29-3,643.48-1,111.80

Finding the Fourth Proportional to 2,431.29, 3,643.48 and 1,111.80

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Solution

The fourth proportional to 2,431.29, 3,643.48 and 1,111.80 is: 1,666.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.29 : 3,643.48 = 1,111.80 : x
  2. Step 2: Convert to fraction form
    2,431.29/3,643.48 = 1,111.80/x
  3. Step 3: Cross multiply
    2,431.29x = 3,643.48 × 1,111.80
  4. Step 4: Simplify right side
    2,431.29x = 4,050,821.06
  5. Step 5: Solve for x
    x = 4,050,821.06/2,431.29
  6. Step 6: Final answer
    x = 1,666.12

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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.