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Finding the Fourth Proportional to 635.76, 953.60 and 270.45

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Solution

The fourth proportional to 635.76, 953.60 and 270.45 is: 405.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.76 : 953.60 = 270.45 : x
  2. Step 2: Convert to fraction form
    635.76/953.60 = 270.45/x
  3. Step 3: Cross multiply
    635.76x = 953.60 × 270.45
  4. Step 4: Simplify right side
    635.76x = 257,899.77
  5. Step 5: Solve for x
    x = 257,899.77/635.76
  6. Step 6: Final answer
    x = 405.66

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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.