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Finding the Fourth Proportional to 1,308.02, 1,805.38 and 748.81

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Solution

The fourth proportional to 1,308.02, 1,805.38 and 748.81 is: 1,033.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.02 : 1,805.38 = 748.81 : x
  2. Step 2: Convert to fraction form
    1,308.02/1,805.38 = 748.81/x
  3. Step 3: Cross multiply
    1,308.02x = 1,805.38 × 748.81
  4. Step 4: Simplify right side
    1,308.02x = 1,351,891.11
  5. Step 5: Solve for x
    x = 1,351,891.11/1,308.02
  6. Step 6: Final answer
    x = 1,033.54

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1.5x scale

Why These Related Problems?

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