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Finding the Fourth Proportional to 709,289.55, 978,819.26 and 454,640.54

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Solution

The fourth proportional to 709,289.55, 978,819.26 and 454,640.54 is: 627,403.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,289.55 : 978,819.26 = 454,640.54 : x
  2. Step 2: Convert to fraction form
    709,289.55/978,819.26 = 454,640.54/x
  3. Step 3: Cross multiply
    709,289.55x = 978,819.26 × 454,640.54
  4. Step 4: Simplify right side
    709,289.55x = 445,010,909,761.50
  5. Step 5: Solve for x
    x = 445,010,909,761.50/709,289.55
  6. Step 6: Final answer
    x = 627,403.73

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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.