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Finding the Fourth Proportional to 847.77, 1,170.50 and 553.43

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Solution

The fourth proportional to 847.77, 1,170.50 and 553.43 is: 764.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.77 : 1,170.50 = 553.43 : x
  2. Step 2: Convert to fraction form
    847.77/1,170.50 = 553.43/x
  3. Step 3: Cross multiply
    847.77x = 1,170.50 × 553.43
  4. Step 4: Simplify right side
    847.77x = 647,793.09
  5. Step 5: Solve for x
    x = 647,793.09/847.77
  6. Step 6: Final answer
    x = 764.12

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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.