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Finding the Fourth Proportional to 1,245.93, 1,719.53 and 748.82

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Solution

The fourth proportional to 1,245.93, 1,719.53 and 748.82 is: 1,033.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.93 : 1,719.53 = 748.82 : x
  2. Step 2: Convert to fraction form
    1,245.93/1,719.53 = 748.82/x
  3. Step 3: Cross multiply
    1,245.93x = 1,719.53 × 748.82
  4. Step 4: Simplify right side
    1,245.93x = 1,287,621.82
  5. Step 5: Solve for x
    x = 1,287,621.82/1,245.93
  6. Step 6: Final answer
    x = 1,033.47

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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.