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Finding the Fourth Proportional to 1,175.50, 1,619.37 and 988.99

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Solution

The fourth proportional to 1,175.50, 1,619.37 and 988.99 is: 1,362.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,175.50 : 1,619.37 = 988.99 : x
  2. Step 2: Convert to fraction form
    1,175.50/1,619.37 = 988.99/x
  3. Step 3: Cross multiply
    1,175.50x = 1,619.37 × 988.99
  4. Step 4: Simplify right side
    1,175.50x = 1,601,543.02
  5. Step 5: Solve for x
    x = 1,601,543.02/1,175.50
  6. Step 6: Final answer
    x = 1,362.44

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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.