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Finding the Fourth Proportional to 448.98, 619.38 and 283.14

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Solution

The fourth proportional to 448.98, 619.38 and 283.14 is: 390.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.98 : 619.38 = 283.14 : x
  2. Step 2: Convert to fraction form
    448.98/619.38 = 283.14/x
  3. Step 3: Cross multiply
    448.98x = 619.38 × 283.14
  4. Step 4: Simplify right side
    448.98x = 175,371.25
  5. Step 5: Solve for x
    x = 175,371.25/448.98
  6. Step 6: Final answer
    x = 390.60

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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.