Home / 1,918.28-2,647.47-1,172.08

Finding the Fourth Proportional to 1,918.28, 2,647.47 and 1,172.08

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Solution

The fourth proportional to 1,918.28, 2,647.47 and 1,172.08 is: 1,617.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.28 : 2,647.47 = 1,172.08 : x
  2. Step 2: Convert to fraction form
    1,918.28/2,647.47 = 1,172.08/x
  3. Step 3: Cross multiply
    1,918.28x = 2,647.47 × 1,172.08
  4. Step 4: Simplify right side
    1,918.28x = 3,103,046.64
  5. Step 5: Solve for x
    x = 3,103,046.64/1,918.28
  6. Step 6: Final answer
    x = 1,617.62

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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.