Home / 1,278.74-1,918.18-547.82

Finding the Fourth Proportional to 1,278.74, 1,918.18 and 547.82

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Solution

The fourth proportional to 1,278.74, 1,918.18 and 547.82 is: 821.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.74 : 1,918.18 = 547.82 : x
  2. Step 2: Convert to fraction form
    1,278.74/1,918.18 = 547.82/x
  3. Step 3: Cross multiply
    1,278.74x = 1,918.18 × 547.82
  4. Step 4: Simplify right side
    1,278.74x = 1,050,817.37
  5. Step 5: Solve for x
    x = 1,050,817.37/1,278.74
  6. Step 6: Final answer
    x = 821.76

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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.