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Finding the Fourth Proportional to 3,287.13, 4,929.20 and 946.60

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Solution

The fourth proportional to 3,287.13, 4,929.20 and 946.60 is: 1,419.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,287.13 : 4,929.20 = 946.60 : x
  2. Step 2: Convert to fraction form
    3,287.13/4,929.20 = 946.60/x
  3. Step 3: Cross multiply
    3,287.13x = 4,929.20 × 946.60
  4. Step 4: Simplify right side
    3,287.13x = 4,665,956.07
  5. Step 5: Solve for x
    x = 4,665,956.07/3,287.13
  6. Step 6: Final answer
    x = 1,419.46

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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.