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Finding the Fourth Proportional to 618,279.83, 926,212.33 and 426,119.88

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Solution

The fourth proportional to 618,279.83, 926,212.33 and 426,119.88 is: 638,347.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,279.83 : 926,212.33 = 426,119.88 : x
  2. Step 2: Convert to fraction form
    618,279.83/926,212.33 = 426,119.88/x
  3. Step 3: Cross multiply
    618,279.83x = 926,212.33 × 426,119.88
  4. Step 4: Simplify right side
    618,279.83x = 394,677,486,914.12
  5. Step 5: Solve for x
    x = 394,677,486,914.12/618,279.83
  6. Step 6: Final answer
    x = 638,347.67

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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.