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Finding the Fourth Proportional to 448.14, 670.32 and 415.32

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Solution

The fourth proportional to 448.14, 670.32 and 415.32 is: 621.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.14 : 670.32 = 415.32 : x
  2. Step 2: Convert to fraction form
    448.14/670.32 = 415.32/x
  3. Step 3: Cross multiply
    448.14x = 670.32 × 415.32
  4. Step 4: Simplify right side
    448.14x = 278,397.30
  5. Step 5: Solve for x
    x = 278,397.30/448.14
  6. Step 6: Final answer
    x = 621.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.