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Finding the Fourth Proportional to 7,288.40, 10,929.40 and 2,904.40

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Solution

The fourth proportional to 7,288.40, 10,929.40 and 2,904.40 is: 4,355.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,288.40 : 10,929.40 = 2,904.40 : x
  2. Step 2: Convert to fraction form
    7,288.40/10,929.40 = 2,904.40/x
  3. Step 3: Cross multiply
    7,288.40x = 10,929.40 × 2,904.40
  4. Step 4: Simplify right side
    7,288.40x = 31,743,349.36
  5. Step 5: Solve for x
    x = 31,743,349.36/7,288.40
  6. Step 6: Final answer
    x = 4,355.32

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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.