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Finding the Fourth Proportional to 703.57, 970.92 and 393.07

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Solution

The fourth proportional to 703.57, 970.92 and 393.07 is: 542.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.57 : 970.92 = 393.07 : x
  2. Step 2: Convert to fraction form
    703.57/970.92 = 393.07/x
  3. Step 3: Cross multiply
    703.57x = 970.92 × 393.07
  4. Step 4: Simplify right side
    703.57x = 381,637.59
  5. Step 5: Solve for x
    x = 381,637.59/703.57
  6. Step 6: Final answer
    x = 542.43

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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.