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Finding the Fourth Proportional to 576.64, 862.68 and 445.64

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Solution

The fourth proportional to 576.64, 862.68 and 445.64 is: 666.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.64 : 862.68 = 445.64 : x
  2. Step 2: Convert to fraction form
    576.64/862.68 = 445.64/x
  3. Step 3: Cross multiply
    576.64x = 862.68 × 445.64
  4. Step 4: Simplify right side
    576.64x = 384,444.72
  5. Step 5: Solve for x
    x = 384,444.72/576.64
  6. Step 6: Final answer
    x = 666.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.