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Finding the Fourth Proportional to 2,491.72, 3,730.53 and 1,319.06

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Solution

The fourth proportional to 2,491.72, 3,730.53 and 1,319.06 is: 1,974.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.72 : 3,730.53 = 1,319.06 : x
  2. Step 2: Convert to fraction form
    2,491.72/3,730.53 = 1,319.06/x
  3. Step 3: Cross multiply
    2,491.72x = 3,730.53 × 1,319.06
  4. Step 4: Simplify right side
    2,491.72x = 4,920,792.90
  5. Step 5: Solve for x
    x = 4,920,792.90/2,491.72
  6. Step 6: Final answer
    x = 1,974.86

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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.