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Finding the Fourth Proportional to 1,798.61, 2,697.45 and 920.61

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Solution

The fourth proportional to 1,798.61, 2,697.45 and 920.61 is: 1,380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,798.61 : 2,697.45 = 920.61 : x
  2. Step 2: Convert to fraction form
    1,798.61/2,697.45 = 920.61/x
  3. Step 3: Cross multiply
    1,798.61x = 2,697.45 × 920.61
  4. Step 4: Simplify right side
    1,798.61x = 2,483,299.44
  5. Step 5: Solve for x
    x = 2,483,299.44/1,798.61
  6. Step 6: Final answer
    x = 1,380.68

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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.