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Finding the Fourth Proportional to 1,611.20, 2,415.72 and 637.04

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Solution

The fourth proportional to 1,611.20, 2,415.72 and 637.04 is: 955.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.20 : 2,415.72 = 637.04 : x
  2. Step 2: Convert to fraction form
    1,611.20/2,415.72 = 637.04/x
  3. Step 3: Cross multiply
    1,611.20x = 2,415.72 × 637.04
  4. Step 4: Simplify right side
    1,611.20x = 1,538,910.27
  5. Step 5: Solve for x
    x = 1,538,910.27/1,611.20
  6. Step 6: Final answer
    x = 955.13

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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.