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Finding the Fourth Proportional to 1,127.09, 1,689.08 and 633.42

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Solution

The fourth proportional to 1,127.09, 1,689.08 and 633.42 is: 949.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.09 : 1,689.08 = 633.42 : x
  2. Step 2: Convert to fraction form
    1,127.09/1,689.08 = 633.42/x
  3. Step 3: Cross multiply
    1,127.09x = 1,689.08 × 633.42
  4. Step 4: Simplify right side
    1,127.09x = 1,069,893.89
  5. Step 5: Solve for x
    x = 1,069,893.89/1,127.09
  6. Step 6: Final answer
    x = 949.25

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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.