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Finding the Fourth Proportional to 1,007,968.60, 1,511,952.90 and 930,986.20

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Solution

The fourth proportional to 1,007,968.60, 1,511,952.90 and 930,986.20 is: 1,396,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007,968.60 : 1,511,952.90 = 930,986.20 : x
  2. Step 2: Convert to fraction form
    1,007,968.60/1,511,952.90 = 930,986.20/x
  3. Step 3: Cross multiply
    1,007,968.60x = 1,511,952.90 × 930,986.20
  4. Step 4: Simplify right side
    1,007,968.60x = 1,407,607,284,949.98
  5. Step 5: Solve for x
    x = 1,407,607,284,949.98/1,007,968.60
  6. Step 6: Final answer
    x = 1,396,479.30

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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.