Home / 3,586.65-5,378.36-1,278.21

Finding the Fourth Proportional to 3,586.65, 5,378.36 and 1,278.21

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Solution

The fourth proportional to 3,586.65, 5,378.36 and 1,278.21 is: 1,916.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,586.65 : 5,378.36 = 1,278.21 : x
  2. Step 2: Convert to fraction form
    3,586.65/5,378.36 = 1,278.21/x
  3. Step 3: Cross multiply
    3,586.65x = 5,378.36 × 1,278.21
  4. Step 4: Simplify right side
    3,586.65x = 6,874,667.14
  5. Step 5: Solve for x
    x = 6,874,667.14/3,586.65
  6. Step 6: Final answer
    x = 1,916.74

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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.