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Finding the Fourth Proportional to 703.63, 971.03 and 393.13

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Solution

The fourth proportional to 703.63, 971.03 and 393.13 is: 542.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.63 : 971.03 = 393.13 : x
  2. Step 2: Convert to fraction form
    703.63/971.03 = 393.13/x
  3. Step 3: Cross multiply
    703.63x = 971.03 × 393.13
  4. Step 4: Simplify right side
    703.63x = 381,741.02
  5. Step 5: Solve for x
    x = 381,741.02/703.63
  6. Step 6: Final answer
    x = 542.53

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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.