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Finding the Fourth Proportional to 1,168.78, 1,753.50 and 620.89

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Solution

The fourth proportional to 1,168.78, 1,753.50 and 620.89 is: 931.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.78 : 1,753.50 = 620.89 : x
  2. Step 2: Convert to fraction form
    1,168.78/1,753.50 = 620.89/x
  3. Step 3: Cross multiply
    1,168.78x = 1,753.50 × 620.89
  4. Step 4: Simplify right side
    1,168.78x = 1,088,730.62
  5. Step 5: Solve for x
    x = 1,088,730.62/1,168.78
  6. Step 6: Final answer
    x = 931.51

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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.