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Finding the Fourth Proportional to 711.73, 981.92 and 431.87

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Solution

The fourth proportional to 711.73, 981.92 and 431.87 is: 595.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.73 : 981.92 = 431.87 : x
  2. Step 2: Convert to fraction form
    711.73/981.92 = 431.87/x
  3. Step 3: Cross multiply
    711.73x = 981.92 × 431.87
  4. Step 4: Simplify right side
    711.73x = 424,054.72
  5. Step 5: Solve for x
    x = 424,054.72/711.73
  6. Step 6: Final answer
    x = 595.81

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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.