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Finding the Fourth Proportional to 484.94, 669.47 and 328.40

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Solution

The fourth proportional to 484.94, 669.47 and 328.40 is: 453.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.94 : 669.47 = 328.40 : x
  2. Step 2: Convert to fraction form
    484.94/669.47 = 328.40/x
  3. Step 3: Cross multiply
    484.94x = 669.47 × 328.40
  4. Step 4: Simplify right side
    484.94x = 219,852.31
  5. Step 5: Solve for x
    x = 219,852.31/484.94
  6. Step 6: Final answer
    x = 453.36

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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.