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Finding the Fourth Proportional to 2,385.74, 3,578.22 and 653.96

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Solution

The fourth proportional to 2,385.74, 3,578.22 and 653.96 is: 980.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.74 : 3,578.22 = 653.96 : x
  2. Step 2: Convert to fraction form
    2,385.74/3,578.22 = 653.96/x
  3. Step 3: Cross multiply
    2,385.74x = 3,578.22 × 653.96
  4. Step 4: Simplify right side
    2,385.74x = 2,340,012.75
  5. Step 5: Solve for x
    x = 2,340,012.75/2,385.74
  6. Step 6: Final answer
    x = 980.83

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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.