Home / 1,278.55-1,917.93-547.95

Finding the Fourth Proportional to 1,278.55, 1,917.93 and 547.95

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Solution

The fourth proportional to 1,278.55, 1,917.93 and 547.95 is: 821.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.55 : 1,917.93 = 547.95 : x
  2. Step 2: Convert to fraction form
    1,278.55/1,917.93 = 547.95/x
  3. Step 3: Cross multiply
    1,278.55x = 1,917.93 × 547.95
  4. Step 4: Simplify right side
    1,278.55x = 1,050,925.12
  5. Step 5: Solve for x
    x = 1,050,925.12/1,278.55
  6. Step 6: Final answer
    x = 821.97

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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.