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Finding the Fourth Proportional to 703.88, 1,055.86 and 292.78

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Solution

The fourth proportional to 703.88, 1,055.86 and 292.78 is: 439.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.88 : 1,055.86 = 292.78 : x
  2. Step 2: Convert to fraction form
    703.88/1,055.86 = 292.78/x
  3. Step 3: Cross multiply
    703.88x = 1,055.86 × 292.78
  4. Step 4: Simplify right side
    703.88x = 309,134.69
  5. Step 5: Solve for x
    x = 309,134.69/703.88
  6. Step 6: Final answer
    x = 439.19

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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.