Home / 1,278.16-1,917.25-456.48

Finding the Fourth Proportional to 1,278.16, 1,917.25 and 456.48

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Solution

The fourth proportional to 1,278.16, 1,917.25 and 456.48 is: 684.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.16 : 1,917.25 = 456.48 : x
  2. Step 2: Convert to fraction form
    1,278.16/1,917.25 = 456.48/x
  3. Step 3: Cross multiply
    1,278.16x = 1,917.25 × 456.48
  4. Step 4: Simplify right side
    1,278.16x = 875,185.14
  5. Step 5: Solve for x
    x = 875,185.14/1,278.16
  6. Step 6: Final answer
    x = 684.72

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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.