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Finding the Fourth Proportional to 448.43, 619.12 and 280.63

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Solution

The fourth proportional to 448.43, 619.12 and 280.63 is: 387.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.43 : 619.12 = 280.63 : x
  2. Step 2: Convert to fraction form
    448.43/619.12 = 280.63/x
  3. Step 3: Cross multiply
    448.43x = 619.12 × 280.63
  4. Step 4: Simplify right side
    448.43x = 173,744.77
  5. Step 5: Solve for x
    x = 173,744.77/448.43
  6. Step 6: Final answer
    x = 387.46

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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.