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Finding the Fourth Proportional to 703.21, 970.38 and 392.71

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Solution

The fourth proportional to 703.21, 970.38 and 392.71 is: 541.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.21 : 970.38 = 392.71 : x
  2. Step 2: Convert to fraction form
    703.21/970.38 = 392.71/x
  3. Step 3: Cross multiply
    703.21x = 970.38 × 392.71
  4. Step 4: Simplify right side
    703.21x = 381,077.93
  5. Step 5: Solve for x
    x = 381,077.93/703.21
  6. Step 6: Final answer
    x = 541.91

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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.