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Finding the Fourth Proportional to 2,390.85, 3,586.43 and 635.83

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Solution

The fourth proportional to 2,390.85, 3,586.43 and 635.83 is: 953.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.85 : 3,586.43 = 635.83 : x
  2. Step 2: Convert to fraction form
    2,390.85/3,586.43 = 635.83/x
  3. Step 3: Cross multiply
    2,390.85x = 3,586.43 × 635.83
  4. Step 4: Simplify right side
    2,390.85x = 2,280,341.85
  5. Step 5: Solve for x
    x = 2,280,341.85/2,390.85
  6. Step 6: Final answer
    x = 953.78

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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.