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Finding the Fourth Proportional to 667,806.75, 999,315.65 and 578,157.80

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Solution

The fourth proportional to 667,806.75, 999,315.65 and 578,157.80 is: 865,163.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,806.75 : 999,315.65 = 578,157.80 : x
  2. Step 2: Convert to fraction form
    667,806.75/999,315.65 = 578,157.80/x
  3. Step 3: Cross multiply
    667,806.75x = 999,315.65 × 578,157.80
  4. Step 4: Simplify right side
    667,806.75x = 577,762,137,709.57
  5. Step 5: Solve for x
    x = 577,762,137,709.57/667,806.75
  6. Step 6: Final answer
    x = 865,163.67

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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.