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Finding the Fourth Proportional to 401.64, 602.56 and 247.74

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Solution

The fourth proportional to 401.64, 602.56 and 247.74 is: 371.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.64 : 602.56 = 247.74 : x
  2. Step 2: Convert to fraction form
    401.64/602.56 = 247.74/x
  3. Step 3: Cross multiply
    401.64x = 602.56 × 247.74
  4. Step 4: Simplify right side
    401.64x = 149,278.21
  5. Step 5: Solve for x
    x = 149,278.21/401.64
  6. Step 6: Final answer
    x = 371.67

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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.