Home / 5,228.42-7,215.08-2,870.78

Finding the Fourth Proportional to 5,228.42, 7,215.08 and 2,870.78

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Solution

The fourth proportional to 5,228.42, 7,215.08 and 2,870.78 is: 3,961.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,228.42 : 7,215.08 = 2,870.78 : x
  2. Step 2: Convert to fraction form
    5,228.42/7,215.08 = 2,870.78/x
  3. Step 3: Cross multiply
    5,228.42x = 7,215.08 × 2,870.78
  4. Step 4: Simplify right side
    5,228.42x = 20,712,856.93
  5. Step 5: Solve for x
    x = 20,712,856.93/5,228.42
  6. Step 6: Final answer
    x = 3,961.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.