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Finding the Fourth Proportional to 2,285.57, 3,428.09 and 642.26

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Solution

The fourth proportional to 2,285.57, 3,428.09 and 642.26 is: 963.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.57 : 3,428.09 = 642.26 : x
  2. Step 2: Convert to fraction form
    2,285.57/3,428.09 = 642.26/x
  3. Step 3: Cross multiply
    2,285.57x = 3,428.09 × 642.26
  4. Step 4: Simplify right side
    2,285.57x = 2,201,714.91
  5. Step 5: Solve for x
    x = 2,201,714.91/2,285.57
  6. Step 6: Final answer
    x = 963.31

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1.5x scale

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.