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Finding the Fourth Proportional to 636.94, 953.17 and 390.07

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Solution

The fourth proportional to 636.94, 953.17 and 390.07 is: 583.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.94 : 953.17 = 390.07 : x
  2. Step 2: Convert to fraction form
    636.94/953.17 = 390.07/x
  3. Step 3: Cross multiply
    636.94x = 953.17 × 390.07
  4. Step 4: Simplify right side
    636.94x = 371,797.88
  5. Step 5: Solve for x
    x = 371,797.88/636.94
  6. Step 6: Final answer
    x = 583.73

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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.