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Finding the Fourth Proportional to 1,825.17, 2,736.87 and 990.92

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Solution

The fourth proportional to 1,825.17, 2,736.87 and 990.92 is: 1,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,825.17 : 2,736.87 = 990.92 : x
  2. Step 2: Convert to fraction form
    1,825.17/2,736.87 = 990.92/x
  3. Step 3: Cross multiply
    1,825.17x = 2,736.87 × 990.92
  4. Step 4: Simplify right side
    1,825.17x = 2,712,019.22
  5. Step 5: Solve for x
    x = 2,712,019.22/1,825.17
  6. Step 6: Final answer
    x = 1,485.90

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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.