Home / 4,278.70-6,415.28-1,812.85

Finding the Fourth Proportional to 4,278.70, 6,415.28 and 1,812.85

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Solution

The fourth proportional to 4,278.70, 6,415.28 and 1,812.85 is: 2,718.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,278.70 : 6,415.28 = 1,812.85 : x
  2. Step 2: Convert to fraction form
    4,278.70/6,415.28 = 1,812.85/x
  3. Step 3: Cross multiply
    4,278.70x = 6,415.28 × 1,812.85
  4. Step 4: Simplify right side
    4,278.70x = 11,629,931.28
  5. Step 5: Solve for x
    x = 11,629,931.28/4,278.70
  6. Step 6: Final answer
    x = 2,718.10

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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.