Home / 1,643.26-2,466.10-777.78

Finding the Fourth Proportional to 1,643.26, 2,466.10 and 777.78

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Solution

The fourth proportional to 1,643.26, 2,466.10 and 777.78 is: 1,167.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.26 : 2,466.10 = 777.78 : x
  2. Step 2: Convert to fraction form
    1,643.26/2,466.10 = 777.78/x
  3. Step 3: Cross multiply
    1,643.26x = 2,466.10 × 777.78
  4. Step 4: Simplify right side
    1,643.26x = 1,918,083.26
  5. Step 5: Solve for x
    x = 1,918,083.26/1,643.26
  6. Step 6: Final answer
    x = 1,167.24

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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.