Home / 1,278.68-1,917.42-585.32

Finding the Fourth Proportional to 1,278.68, 1,917.42 and 585.32

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Solution

The fourth proportional to 1,278.68, 1,917.42 and 585.32 is: 877.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.68 : 1,917.42 = 585.32 : x
  2. Step 2: Convert to fraction form
    1,278.68/1,917.42 = 585.32/x
  3. Step 3: Cross multiply
    1,278.68x = 1,917.42 × 585.32
  4. Step 4: Simplify right side
    1,278.68x = 1,122,304.27
  5. Step 5: Solve for x
    x = 1,122,304.27/1,278.68
  6. Step 6: Final answer
    x = 877.71

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1.5x scale

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.