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Finding the Fourth Proportional to 1,611.63, 2,224.15 and 903.53

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Solution

The fourth proportional to 1,611.63, 2,224.15 and 903.53 is: 1,246.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.63 : 2,224.15 = 903.53 : x
  2. Step 2: Convert to fraction form
    1,611.63/2,224.15 = 903.53/x
  3. Step 3: Cross multiply
    1,611.63x = 2,224.15 × 903.53
  4. Step 4: Simplify right side
    1,611.63x = 2,009,589.55
  5. Step 5: Solve for x
    x = 2,009,589.55/1,611.63
  6. Step 6: Final answer
    x = 1,246.93

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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.