Home / 1,277.64-1,917.23-547.20

Finding the Fourth Proportional to 1,277.64, 1,917.23 and 547.20

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Solution

The fourth proportional to 1,277.64, 1,917.23 and 547.20 is: 821.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.64 : 1,917.23 = 547.20 : x
  2. Step 2: Convert to fraction form
    1,277.64/1,917.23 = 547.20/x
  3. Step 3: Cross multiply
    1,277.64x = 1,917.23 × 547.20
  4. Step 4: Simplify right side
    1,277.64x = 1,049,105.52
  5. Step 5: Solve for x
    x = 1,049,105.52/1,277.64
  6. Step 6: Final answer
    x = 821.13

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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.