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Finding the Fourth Proportional to 703.33, 1,055.46 and 378.92

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Solution

The fourth proportional to 703.33, 1,055.46 and 378.92 is: 568.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.33 : 1,055.46 = 378.92 : x
  2. Step 2: Convert to fraction form
    703.33/1,055.46 = 378.92/x
  3. Step 3: Cross multiply
    703.33x = 1,055.46 × 378.92
  4. Step 4: Simplify right side
    703.33x = 399,934.90
  5. Step 5: Solve for x
    x = 399,934.90/703.33
  6. Step 6: Final answer
    x = 568.63

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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.