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Finding the Fourth Proportional to 866,978.20, 1,300,467.30 and 762,002.20

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Solution

The fourth proportional to 866,978.20, 1,300,467.30 and 762,002.20 is: 1,143,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,978.20 : 1,300,467.30 = 762,002.20 : x
  2. Step 2: Convert to fraction form
    866,978.20/1,300,467.30 = 762,002.20/x
  3. Step 3: Cross multiply
    866,978.20x = 1,300,467.30 × 762,002.20
  4. Step 4: Simplify right side
    866,978.20x = 990,958,943,628.06
  5. Step 5: Solve for x
    x = 990,958,943,628.06/866,978.20
  6. Step 6: Final answer
    x = 1,143,003.30

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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.