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Finding the Fourth Proportional to 1,485.70, 2,215.07 and 1,447.24

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Solution

The fourth proportional to 1,485.70, 2,215.07 and 1,447.24 is: 2,157.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.70 : 2,215.07 = 1,447.24 : x
  2. Step 2: Convert to fraction form
    1,485.70/2,215.07 = 1,447.24/x
  3. Step 3: Cross multiply
    1,485.70x = 2,215.07 × 1,447.24
  4. Step 4: Simplify right side
    1,485.70x = 3,205,737.91
  5. Step 5: Solve for x
    x = 3,205,737.91/1,485.70
  6. Step 6: Final answer
    x = 2,157.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.