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Finding the Fourth Proportional to 703.91, 971.18 and 455.37

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Solution

The fourth proportional to 703.91, 971.18 and 455.37 is: 628.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.91 : 971.18 = 455.37 : x
  2. Step 2: Convert to fraction form
    703.91/971.18 = 455.37/x
  3. Step 3: Cross multiply
    703.91x = 971.18 × 455.37
  4. Step 4: Simplify right side
    703.91x = 442,246.24
  5. Step 5: Solve for x
    x = 442,246.24/703.91
  6. Step 6: Final answer
    x = 628.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.