Home / 2,215.53-3,325.12-917.91

Finding the Fourth Proportional to 2,215.53, 3,325.12 and 917.91

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Solution

The fourth proportional to 2,215.53, 3,325.12 and 917.91 is: 1,377.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.53 : 3,325.12 = 917.91 : x
  2. Step 2: Convert to fraction form
    2,215.53/3,325.12 = 917.91/x
  3. Step 3: Cross multiply
    2,215.53x = 3,325.12 × 917.91
  4. Step 4: Simplify right side
    2,215.53x = 3,052,158.60
  5. Step 5: Solve for x
    x = 3,052,158.60/2,215.53
  6. Step 6: Final answer
    x = 1,377.62

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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.