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Finding the Fourth Proportional to 1,861.83, 2,792.32 and 766.53

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Solution

The fourth proportional to 1,861.83, 2,792.32 and 766.53 is: 1,149.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.83 : 2,792.32 = 766.53 : x
  2. Step 2: Convert to fraction form
    1,861.83/2,792.32 = 766.53/x
  3. Step 3: Cross multiply
    1,861.83x = 2,792.32 × 766.53
  4. Step 4: Simplify right side
    1,861.83x = 2,140,395.13
  5. Step 5: Solve for x
    x = 2,140,395.13/1,861.83
  6. Step 6: Final answer
    x = 1,149.62

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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.