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Finding the Fourth Proportional to 703.11, 970.34 and 392.61

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Solution

The fourth proportional to 703.11, 970.34 and 392.61 is: 541.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.11 : 970.34 = 392.61 : x
  2. Step 2: Convert to fraction form
    703.11/970.34 = 392.61/x
  3. Step 3: Cross multiply
    703.11x = 970.34 × 392.61
  4. Step 4: Simplify right side
    703.11x = 380,963.22
  5. Step 5: Solve for x
    x = 380,963.22/703.11
  6. Step 6: Final answer
    x = 541.83

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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.