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Finding the Fourth Proportional to 703.38, 971.32 and 455.13

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Solution

The fourth proportional to 703.38, 971.32 and 455.13 is: 628.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.38 : 971.32 = 455.13 : x
  2. Step 2: Convert to fraction form
    703.38/971.32 = 455.13/x
  3. Step 3: Cross multiply
    703.38x = 971.32 × 455.13
  4. Step 4: Simplify right side
    703.38x = 442,076.67
  5. Step 5: Solve for x
    x = 442,076.67/703.38
  6. Step 6: Final answer
    x = 628.50

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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.