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Finding the Fourth Proportional to 5,978,680.40, 8,968,020.60 and 2,191,671.20

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Solution

The fourth proportional to 5,978,680.40, 8,968,020.60 and 2,191,671.20 is: 3,287,506.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,978,680.40 : 8,968,020.60 = 2,191,671.20 : x
  2. Step 2: Convert to fraction form
    5,978,680.40/8,968,020.60 = 2,191,671.20/x
  3. Step 3: Cross multiply
    5,978,680.40x = 8,968,020.60 × 2,191,671.20
  4. Step 4: Simplify right side
    5,978,680.40x = 19,654,952,470,026.72
  5. Step 5: Solve for x
    x = 19,654,952,470,026.72/5,978,680.40
  6. Step 6: Final answer
    x = 3,287,506.80

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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.