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Finding the Fourth Proportional to 1,209.55, 1,814.76 and 746.79

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Solution

The fourth proportional to 1,209.55, 1,814.76 and 746.79 is: 1,120.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.55 : 1,814.76 = 746.79 : x
  2. Step 2: Convert to fraction form
    1,209.55/1,814.76 = 746.79/x
  3. Step 3: Cross multiply
    1,209.55x = 1,814.76 × 746.79
  4. Step 4: Simplify right side
    1,209.55x = 1,355,244.62
  5. Step 5: Solve for x
    x = 1,355,244.62/1,209.55
  6. Step 6: Final answer
    x = 1,120.45

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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.