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Finding the Fourth Proportional to 1,302.21, 1,953.32 and 328.31

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Solution

The fourth proportional to 1,302.21, 1,953.32 and 328.31 is: 492.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302.21 : 1,953.32 = 328.31 : x
  2. Step 2: Convert to fraction form
    1,302.21/1,953.32 = 328.31/x
  3. Step 3: Cross multiply
    1,302.21x = 1,953.32 × 328.31
  4. Step 4: Simplify right side
    1,302.21x = 641,297.73
  5. Step 5: Solve for x
    x = 641,297.73/1,302.21
  6. Step 6: Final answer
    x = 492.47

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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.