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Finding the Fourth Proportional to 2,898.65, 4,000.12 and 1,639.69

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Solution

The fourth proportional to 2,898.65, 4,000.12 and 1,639.69 is: 2,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,898.65 : 4,000.12 = 1,639.69 : x
  2. Step 2: Convert to fraction form
    2,898.65/4,000.12 = 1,639.69/x
  3. Step 3: Cross multiply
    2,898.65x = 4,000.12 × 1,639.69
  4. Step 4: Simplify right side
    2,898.65x = 6,558,970.63
  5. Step 5: Solve for x
    x = 6,558,970.63/2,898.65
  6. Step 6: Final answer
    x = 2,262.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.