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Finding the Fourth Proportional to 702,919.20, 1,054,378.80 and 668,512.80

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Solution

The fourth proportional to 702,919.20, 1,054,378.80 and 668,512.80 is: 1,002,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,919.20 : 1,054,378.80 = 668,512.80 : x
  2. Step 2: Convert to fraction form
    702,919.20/1,054,378.80 = 668,512.80/x
  3. Step 3: Cross multiply
    702,919.20x = 1,054,378.80 × 668,512.80
  4. Step 4: Simplify right side
    702,919.20x = 704,865,723,848.64
  5. Step 5: Solve for x
    x = 704,865,723,848.64/702,919.20
  6. Step 6: Final answer
    x = 1,002,769.20

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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.