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Finding the Fourth Proportional to 773.08, 1,157.76 and 447.46

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Solution

The fourth proportional to 773.08, 1,157.76 and 447.46 is: 670.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.08 : 1,157.76 = 447.46 : x
  2. Step 2: Convert to fraction form
    773.08/1,157.76 = 447.46/x
  3. Step 3: Cross multiply
    773.08x = 1,157.76 × 447.46
  4. Step 4: Simplify right side
    773.08x = 518,048.40
  5. Step 5: Solve for x
    x = 518,048.40/773.08
  6. Step 6: Final answer
    x = 670.11

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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.