Home / 1,278.18-1,918.08-888.57

Finding the Fourth Proportional to 1,278.18, 1,918.08 and 888.57

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Solution

The fourth proportional to 1,278.18, 1,918.08 and 888.57 is: 1,333.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.18 : 1,918.08 = 888.57 : x
  2. Step 2: Convert to fraction form
    1,278.18/1,918.08 = 888.57/x
  3. Step 3: Cross multiply
    1,278.18x = 1,918.08 × 888.57
  4. Step 4: Simplify right side
    1,278.18x = 1,704,348.35
  5. Step 5: Solve for x
    x = 1,704,348.35/1,278.18
  6. Step 6: Final answer
    x = 1,333.42

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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.