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Finding the Fourth Proportional to 1,293.62, 1,940.34 and 471.80

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Solution

The fourth proportional to 1,293.62, 1,940.34 and 471.80 is: 707.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.62 : 1,940.34 = 471.80 : x
  2. Step 2: Convert to fraction form
    1,293.62/1,940.34 = 471.80/x
  3. Step 3: Cross multiply
    1,293.62x = 1,940.34 × 471.80
  4. Step 4: Simplify right side
    1,293.62x = 915,452.41
  5. Step 5: Solve for x
    x = 915,452.41/1,293.62
  6. Step 6: Final answer
    x = 707.67

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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.