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Finding the Fourth Proportional to 2,672,936.40, 4,009,404.60 and 989,821.20

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Solution

The fourth proportional to 2,672,936.40, 4,009,404.60 and 989,821.20 is: 1,484,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672,936.40 : 4,009,404.60 = 989,821.20 : x
  2. Step 2: Convert to fraction form
    2,672,936.40/4,009,404.60 = 989,821.20/x
  3. Step 3: Cross multiply
    2,672,936.40x = 4,009,404.60 × 989,821.20
  4. Step 4: Simplify right side
    2,672,936.40x = 3,968,593,672,457.52
  5. Step 5: Solve for x
    x = 3,968,593,672,457.52/2,672,936.40
  6. Step 6: Final answer
    x = 1,484,731.80

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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.