Home / 3,586.40-5,380.64-1,278.08

Finding the Fourth Proportional to 3,586.40, 5,380.64 and 1,278.08

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Solution

The fourth proportional to 3,586.40, 5,380.64 and 1,278.08 is: 1,917.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,586.40 : 5,380.64 = 1,278.08 : x
  2. Step 2: Convert to fraction form
    3,586.40/5,380.64 = 1,278.08/x
  3. Step 3: Cross multiply
    3,586.40x = 5,380.64 × 1,278.08
  4. Step 4: Simplify right side
    3,586.40x = 6,876,888.37
  5. Step 5: Solve for x
    x = 6,876,888.37/3,586.40
  6. Step 6: Final answer
    x = 1,917.49

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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.