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Finding the Fourth Proportional to 448.02, 618.45 and 308.08

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Solution

The fourth proportional to 448.02, 618.45 and 308.08 is: 425.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.02 : 618.45 = 308.08 : x
  2. Step 2: Convert to fraction form
    448.02/618.45 = 308.08/x
  3. Step 3: Cross multiply
    448.02x = 618.45 × 308.08
  4. Step 4: Simplify right side
    448.02x = 190,532.08
  5. Step 5: Solve for x
    x = 190,532.08/448.02
  6. Step 6: Final answer
    x = 425.28

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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.