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Finding the Fourth Proportional to 808,859.70, 1,213,289.55 and 543,438.90

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Solution

The fourth proportional to 808,859.70, 1,213,289.55 and 543,438.90 is: 815,158.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,859.70 : 1,213,289.55 = 543,438.90 : x
  2. Step 2: Convert to fraction form
    808,859.70/1,213,289.55 = 543,438.90/x
  3. Step 3: Cross multiply
    808,859.70x = 1,213,289.55 × 543,438.90
  4. Step 4: Simplify right side
    808,859.70x = 659,348,738,433.50
  5. Step 5: Solve for x
    x = 659,348,738,433.50/808,859.70
  6. Step 6: Final answer
    x = 815,158.35

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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.