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Finding the Fourth Proportional to 448.90, 619.47 and 252.40

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Solution

The fourth proportional to 448.90, 619.47 and 252.40 is: 348.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.90 : 619.47 = 252.40 : x
  2. Step 2: Convert to fraction form
    448.90/619.47 = 252.40/x
  3. Step 3: Cross multiply
    448.90x = 619.47 × 252.40
  4. Step 4: Simplify right side
    448.90x = 156,354.23
  5. Step 5: Solve for x
    x = 156,354.23/448.90
  6. Step 6: Final answer
    x = 348.31

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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.