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Finding the Fourth Proportional to 401.22, 601.64 and 253.02

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Solution

The fourth proportional to 401.22, 601.64 and 253.02 is: 379.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.22 : 601.64 = 253.02 : x
  2. Step 2: Convert to fraction form
    401.22/601.64 = 253.02/x
  3. Step 3: Cross multiply
    401.22x = 601.64 × 253.02
  4. Step 4: Simplify right side
    401.22x = 152,226.95
  5. Step 5: Solve for x
    x = 152,226.95/401.22
  6. Step 6: Final answer
    x = 379.41

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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.