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Finding the Fourth Proportional to 636.60, 949.75 and 555.60

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Solution

The fourth proportional to 636.60, 949.75 and 555.60 is: 828.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.60 : 949.75 = 555.60 : x
  2. Step 2: Convert to fraction form
    636.60/949.75 = 555.60/x
  3. Step 3: Cross multiply
    636.60x = 949.75 × 555.60
  4. Step 4: Simplify right side
    636.60x = 527,681.10
  5. Step 5: Solve for x
    x = 527,681.10/636.60
  6. Step 6: Final answer
    x = 828.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.