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Finding the Fourth Proportional to 448.64, 617.88 and 419.36

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Solution

The fourth proportional to 448.64, 617.88 and 419.36 is: 577.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.64 : 617.88 = 419.36 : x
  2. Step 2: Convert to fraction form
    448.64/617.88 = 419.36/x
  3. Step 3: Cross multiply
    448.64x = 617.88 × 419.36
  4. Step 4: Simplify right side
    448.64x = 259,114.16
  5. Step 5: Solve for x
    x = 259,114.16/448.64
  6. Step 6: Final answer
    x = 577.55

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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.