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Finding the Fourth Proportional to 1,349.74, 1,861.68 and 825.67

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Solution

The fourth proportional to 1,349.74, 1,861.68 and 825.67 is: 1,138.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.74 : 1,861.68 = 825.67 : x
  2. Step 2: Convert to fraction form
    1,349.74/1,861.68 = 825.67/x
  3. Step 3: Cross multiply
    1,349.74x = 1,861.68 × 825.67
  4. Step 4: Simplify right side
    1,349.74x = 1,537,133.33
  5. Step 5: Solve for x
    x = 1,537,133.33/1,349.74
  6. Step 6: Final answer
    x = 1,138.84

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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.