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Finding the Fourth Proportional to 2,497.78, 3,746.26 and 766

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Solution

The fourth proportional to 2,497.78, 3,746.26 and 766 is: 1,148.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,497.78 : 3,746.26 = 766 : x
  2. Step 2: Convert to fraction form
    2,497.78/3,746.26 = 766/x
  3. Step 3: Cross multiply
    2,497.78x = 3,746.26 × 766
  4. Step 4: Simplify right side
    2,497.78x = 2,869,635.16
  5. Step 5: Solve for x
    x = 2,869,635.16/2,497.78
  6. Step 6: Final answer
    x = 1,148.87

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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.