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Finding the Fourth Proportional to 703.82, 1,055.84 and 338.31

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Solution

The fourth proportional to 703.82, 1,055.84 and 338.31 is: 507.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.82 : 1,055.84 = 338.31 : x
  2. Step 2: Convert to fraction form
    703.82/1,055.84 = 338.31/x
  3. Step 3: Cross multiply
    703.82x = 1,055.84 × 338.31
  4. Step 4: Simplify right side
    703.82x = 357,199.54
  5. Step 5: Solve for x
    x = 357,199.54/703.82
  6. Step 6: Final answer
    x = 507.51

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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.