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Finding the Fourth Proportional to 1,890.99, 2,607.49 and 1,293.55

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Solution

The fourth proportional to 1,890.99, 2,607.49 and 1,293.55 is: 1,783.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.99 : 2,607.49 = 1,293.55 : x
  2. Step 2: Convert to fraction form
    1,890.99/2,607.49 = 1,293.55/x
  3. Step 3: Cross multiply
    1,890.99x = 2,607.49 × 1,293.55
  4. Step 4: Simplify right side
    1,890.99x = 3,372,913.79
  5. Step 5: Solve for x
    x = 3,372,913.79/1,890.99
  6. Step 6: Final answer
    x = 1,783.68

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.