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Finding the Fourth Proportional to 1,161.03, 1,602.27 and 768.45

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Solution

The fourth proportional to 1,161.03, 1,602.27 and 768.45 is: 1,060.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.03 : 1,602.27 = 768.45 : x
  2. Step 2: Convert to fraction form
    1,161.03/1,602.27 = 768.45/x
  3. Step 3: Cross multiply
    1,161.03x = 1,602.27 × 768.45
  4. Step 4: Simplify right side
    1,161.03x = 1,231,264.38
  5. Step 5: Solve for x
    x = 1,231,264.38/1,161.03
  6. Step 6: Final answer
    x = 1,060.49

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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.