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Finding the Fourth Proportional to 615,757.07, 923,928.05 and 426,508.67

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Solution

The fourth proportional to 615,757.07, 923,928.05 and 426,508.67 is: 639,965.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,757.07 : 923,928.05 = 426,508.67 : x
  2. Step 2: Convert to fraction form
    615,757.07/923,928.05 = 426,508.67/x
  3. Step 3: Cross multiply
    615,757.07x = 923,928.05 × 426,508.67
  4. Step 4: Simplify right side
    615,757.07x = 394,063,327,157.29
  5. Step 5: Solve for x
    x = 394,063,327,157.29/615,757.07
  6. Step 6: Final answer
    x = 639,965.57

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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.