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Finding the Fourth Proportional to 1,302.85, 1,954.09 and 328.89

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Solution

The fourth proportional to 1,302.85, 1,954.09 and 328.89 is: 493.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302.85 : 1,954.09 = 328.89 : x
  2. Step 2: Convert to fraction form
    1,302.85/1,954.09 = 328.89/x
  3. Step 3: Cross multiply
    1,302.85x = 1,954.09 × 328.89
  4. Step 4: Simplify right side
    1,302.85x = 642,674.95
  5. Step 5: Solve for x
    x = 642,674.95/1,302.85
  6. Step 6: Final answer
    x = 493.29

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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.