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Finding the Fourth Proportional to 2,285.80, 3,428.52 and 642.22

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Solution

The fourth proportional to 2,285.80, 3,428.52 and 642.22 is: 963.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.80 : 3,428.52 = 642.22 : x
  2. Step 2: Convert to fraction form
    2,285.80/3,428.52 = 642.22/x
  3. Step 3: Cross multiply
    2,285.80x = 3,428.52 × 642.22
  4. Step 4: Simplify right side
    2,285.80x = 2,201,864.11
  5. Step 5: Solve for x
    x = 2,201,864.11/2,285.80
  6. Step 6: Final answer
    x = 963.28

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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.