Home / 5,228.57-7,215.39-2,870.66

Finding the Fourth Proportional to 5,228.57, 7,215.39 and 2,870.66

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Solution

The fourth proportional to 5,228.57, 7,215.39 and 2,870.66 is: 3,961.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,228.57 : 7,215.39 = 2,870.66 : x
  2. Step 2: Convert to fraction form
    5,228.57/7,215.39 = 2,870.66/x
  3. Step 3: Cross multiply
    5,228.57x = 7,215.39 × 2,870.66
  4. Step 4: Simplify right side
    5,228.57x = 20,712,895.38
  5. Step 5: Solve for x
    x = 20,712,895.38/5,228.57
  6. Step 6: Final answer
    x = 3,961.49

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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.