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Finding the Fourth Proportional to 1,788.99, 2,681.65 and 749.60

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Solution

The fourth proportional to 1,788.99, 2,681.65 and 749.60 is: 1,123.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.99 : 2,681.65 = 749.60 : x
  2. Step 2: Convert to fraction form
    1,788.99/2,681.65 = 749.60/x
  3. Step 3: Cross multiply
    1,788.99x = 2,681.65 × 749.60
  4. Step 4: Simplify right side
    1,788.99x = 2,010,164.84
  5. Step 5: Solve for x
    x = 2,010,164.84/1,788.99
  6. Step 6: Final answer
    x = 1,123.63

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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.