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Finding the Fourth Proportional to 1,861.85, 2,792.77 and 835.13

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Solution

The fourth proportional to 1,861.85, 2,792.77 and 835.13 is: 1,252.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.85 : 2,792.77 = 835.13 : x
  2. Step 2: Convert to fraction form
    1,861.85/2,792.77 = 835.13/x
  3. Step 3: Cross multiply
    1,861.85x = 2,792.77 × 835.13
  4. Step 4: Simplify right side
    1,861.85x = 2,332,312.05
  5. Step 5: Solve for x
    x = 2,332,312.05/1,861.85
  6. Step 6: Final answer
    x = 1,252.69

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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.