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Finding the Fourth Proportional to 703.64, 1,055.48 and 318.44

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Solution

The fourth proportional to 703.64, 1,055.48 and 318.44 is: 477.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.64 : 1,055.48 = 318.44 : x
  2. Step 2: Convert to fraction form
    703.64/1,055.48 = 318.44/x
  3. Step 3: Cross multiply
    703.64x = 1,055.48 × 318.44
  4. Step 4: Simplify right side
    703.64x = 336,107.05
  5. Step 5: Solve for x
    x = 336,107.05/703.64
  6. Step 6: Final answer
    x = 477.67

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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.