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Finding the Fourth Proportional to 2,285.98, 3,428.91 and 642.64

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Solution

The fourth proportional to 2,285.98, 3,428.91 and 642.64 is: 963.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.98 : 3,428.91 = 642.64 : x
  2. Step 2: Convert to fraction form
    2,285.98/3,428.91 = 642.64/x
  3. Step 3: Cross multiply
    2,285.98x = 3,428.91 × 642.64
  4. Step 4: Simplify right side
    2,285.98x = 2,203,554.72
  5. Step 5: Solve for x
    x = 2,203,554.72/2,285.98
  6. Step 6: Final answer
    x = 963.94

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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.