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Finding the Fourth Proportional to 2,385.70, 3,579.95 and 998.92

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Solution

The fourth proportional to 2,385.70, 3,579.95 and 998.92 is: 1,498.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.70 : 3,579.95 = 998.92 : x
  2. Step 2: Convert to fraction form
    2,385.70/3,579.95 = 998.92/x
  3. Step 3: Cross multiply
    2,385.70x = 3,579.95 × 998.92
  4. Step 4: Simplify right side
    2,385.70x = 3,576,083.65
  5. Step 5: Solve for x
    x = 3,576,083.65/2,385.70
  6. Step 6: Final answer
    x = 1,498.97

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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.