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Finding the Fourth Proportional to 1,611.57, 2,224.28 and 948.99

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Solution

The fourth proportional to 1,611.57, 2,224.28 and 948.99 is: 1,309.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.57 : 2,224.28 = 948.99 : x
  2. Step 2: Convert to fraction form
    1,611.57/2,224.28 = 948.99/x
  3. Step 3: Cross multiply
    1,611.57x = 2,224.28 × 948.99
  4. Step 4: Simplify right side
    1,611.57x = 2,110,803.61
  5. Step 5: Solve for x
    x = 2,110,803.61/1,611.57
  6. Step 6: Final answer
    x = 1,309.78

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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.