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Finding the Fourth Proportional to 711.59, 981.52 and 449.96

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Solution

The fourth proportional to 711.59, 981.52 and 449.96 is: 620.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.59 : 981.52 = 449.96 : x
  2. Step 2: Convert to fraction form
    711.59/981.52 = 449.96/x
  3. Step 3: Cross multiply
    711.59x = 981.52 × 449.96
  4. Step 4: Simplify right side
    711.59x = 441,638.71
  5. Step 5: Solve for x
    x = 441,638.71/711.59
  6. Step 6: Final answer
    x = 620.64

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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.