Home / 1,916.88-2,644.08-1,218.72

Finding the Fourth Proportional to 1,916.88, 2,644.08 and 1,218.72

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Solution

The fourth proportional to 1,916.88, 2,644.08 and 1,218.72 is: 1,681.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.88 : 2,644.08 = 1,218.72 : x
  2. Step 2: Convert to fraction form
    1,916.88/2,644.08 = 1,218.72/x
  3. Step 3: Cross multiply
    1,916.88x = 2,644.08 × 1,218.72
  4. Step 4: Simplify right side
    1,916.88x = 3,222,393.18
  5. Step 5: Solve for x
    x = 3,222,393.18/1,916.88
  6. Step 6: Final answer
    x = 1,681.06

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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.