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Finding the Fourth Proportional to 3,287.07, 4,929.87 and 946.55

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Solution

The fourth proportional to 3,287.07, 4,929.87 and 946.55 is: 1,419.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,287.07 : 4,929.87 = 946.55 : x
  2. Step 2: Convert to fraction form
    3,287.07/4,929.87 = 946.55/x
  3. Step 3: Cross multiply
    3,287.07x = 4,929.87 × 946.55
  4. Step 4: Simplify right side
    3,287.07x = 4,666,379.00
  5. Step 5: Solve for x
    x = 4,666,379.00/3,287.07
  6. Step 6: Final answer
    x = 1,419.62

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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.