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Finding the Fourth Proportional to 703.58, 1,055.67 and 378.57

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Solution

The fourth proportional to 703.58, 1,055.67 and 378.57 is: 568.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.58 : 1,055.67 = 378.57 : x
  2. Step 2: Convert to fraction form
    703.58/1,055.67 = 378.57/x
  3. Step 3: Cross multiply
    703.58x = 1,055.67 × 378.57
  4. Step 4: Simplify right side
    703.58x = 399,644.99
  5. Step 5: Solve for x
    x = 399,644.99/703.58
  6. Step 6: Final answer
    x = 568.02

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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.