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Finding the Fourth Proportional to 770.44, 1,155.92 and 359.61

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Solution

The fourth proportional to 770.44, 1,155.92 and 359.61 is: 539.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.44 : 1,155.92 = 359.61 : x
  2. Step 2: Convert to fraction form
    770.44/1,155.92 = 359.61/x
  3. Step 3: Cross multiply
    770.44x = 1,155.92 × 359.61
  4. Step 4: Simplify right side
    770.44x = 415,686.03
  5. Step 5: Solve for x
    x = 415,686.03/770.44
  6. Step 6: Final answer
    x = 539.55

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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.