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Finding the Fourth Proportional to 636.43, 954.64 and 307.40

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Solution

The fourth proportional to 636.43, 954.64 and 307.40 is: 461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.43 : 954.64 = 307.40 : x
  2. Step 2: Convert to fraction form
    636.43/954.64 = 307.40/x
  3. Step 3: Cross multiply
    636.43x = 954.64 × 307.40
  4. Step 4: Simplify right side
    636.43x = 293,454.80
  5. Step 5: Solve for x
    x = 293,454.80/636.43
  6. Step 6: Final answer
    x = 461.10

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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.