Home / 1,918.15-2,877.22-668.79

Finding the Fourth Proportional to 1,918.15, 2,877.22 and 668.79

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Solution

The fourth proportional to 1,918.15, 2,877.22 and 668.79 is: 1,003.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.15 : 2,877.22 = 668.79 : x
  2. Step 2: Convert to fraction form
    1,918.15/2,877.22 = 668.79/x
  3. Step 3: Cross multiply
    1,918.15x = 2,877.22 × 668.79
  4. Step 4: Simplify right side
    1,918.15x = 1,924,256.80
  5. Step 5: Solve for x
    x = 1,924,256.80/1,918.15
  6. Step 6: Final answer
    x = 1,003.19

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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.