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Finding the Fourth Proportional to 448.90, 619.36 and 271.72

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Solution

The fourth proportional to 448.90, 619.36 and 271.72 is: 374.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.90 : 619.36 = 271.72 : x
  2. Step 2: Convert to fraction form
    448.90/619.36 = 271.72/x
  3. Step 3: Cross multiply
    448.90x = 619.36 × 271.72
  4. Step 4: Simplify right side
    448.90x = 168,292.50
  5. Step 5: Solve for x
    x = 168,292.50/448.90
  6. Step 6: Final answer
    x = 374.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.