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Finding the Fourth Proportional to 2,864.78, 4,295.68 and 916.73

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Solution

The fourth proportional to 2,864.78, 4,295.68 and 916.73 is: 1,374.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,864.78 : 4,295.68 = 916.73 : x
  2. Step 2: Convert to fraction form
    2,864.78/4,295.68 = 916.73/x
  3. Step 3: Cross multiply
    2,864.78x = 4,295.68 × 916.73
  4. Step 4: Simplify right side
    2,864.78x = 3,937,978.73
  5. Step 5: Solve for x
    x = 3,937,978.73/2,864.78
  6. Step 6: Final answer
    x = 1,374.62

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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.