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Finding the Fourth Proportional to 448.76, 619.46 and 283.28

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Solution

The fourth proportional to 448.76, 619.46 and 283.28 is: 391.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.76 : 619.46 = 283.28 : x
  2. Step 2: Convert to fraction form
    448.76/619.46 = 283.28/x
  3. Step 3: Cross multiply
    448.76x = 619.46 × 283.28
  4. Step 4: Simplify right side
    448.76x = 175,480.63
  5. Step 5: Solve for x
    x = 175,480.63/448.76
  6. Step 6: Final answer
    x = 391.03

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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.