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Finding the Fourth Proportional to 703.72, 1,055.78 and 293.05

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Solution

The fourth proportional to 703.72, 1,055.78 and 293.05 is: 439.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.72 : 1,055.78 = 293.05 : x
  2. Step 2: Convert to fraction form
    703.72/1,055.78 = 293.05/x
  3. Step 3: Cross multiply
    703.72x = 1,055.78 × 293.05
  4. Step 4: Simplify right side
    703.72x = 309,394.86
  5. Step 5: Solve for x
    x = 309,394.86/703.72
  6. Step 6: Final answer
    x = 439.66

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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.