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Finding the Fourth Proportional to 5,085.79, 7,629.29 and 1,798.21

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Solution

The fourth proportional to 5,085.79, 7,629.29 and 1,798.21 is: 2,697.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,085.79 : 7,629.29 = 1,798.21 : x
  2. Step 2: Convert to fraction form
    5,085.79/7,629.29 = 1,798.21/x
  3. Step 3: Cross multiply
    5,085.79x = 7,629.29 × 1,798.21
  4. Step 4: Simplify right side
    5,085.79x = 13,719,065.57
  5. Step 5: Solve for x
    x = 13,719,065.57/5,085.79
  6. Step 6: Final answer
    x = 2,697.53

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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.