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Finding the Fourth Proportional to 654.64, 980.58 and 448.24

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Solution

The fourth proportional to 654.64, 980.58 and 448.24 is: 671.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.64 : 980.58 = 448.24 : x
  2. Step 2: Convert to fraction form
    654.64/980.58 = 448.24/x
  3. Step 3: Cross multiply
    654.64x = 980.58 × 448.24
  4. Step 4: Simplify right side
    654.64x = 439,535.18
  5. Step 5: Solve for x
    x = 439,535.18/654.64
  6. Step 6: Final answer
    x = 671.42

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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.