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Finding the Fourth Proportional to 703.73, 971.15 and 389.00

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Solution

The fourth proportional to 703.73, 971.15 and 389.00 is: 536.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.73 : 971.15 = 389.00 : x
  2. Step 2: Convert to fraction form
    703.73/971.15 = 389.00/x
  3. Step 3: Cross multiply
    703.73x = 971.15 × 389.00
  4. Step 4: Simplify right side
    703.73x = 377,770.55
  5. Step 5: Solve for x
    x = 377,770.55/703.73
  6. Step 6: Final answer
    x = 536.81

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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.