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Finding the Fourth Proportional to 6,978,845.49, 9,620,711.42 and 4,620,089.44

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Solution

The fourth proportional to 6,978,845.49, 9,620,711.42 and 4,620,089.44 is: 6,369,040.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978,845.49 : 9,620,711.42 = 4,620,089.44 : x
  2. Step 2: Convert to fraction form
    6,978,845.49/9,620,711.42 = 4,620,089.44/x
  3. Step 3: Cross multiply
    6,978,845.49x = 9,620,711.42 × 4,620,089.44
  4. Step 4: Simplify right side
    6,978,845.49x = 44,448,547,225,750.99
  5. Step 5: Solve for x
    x = 44,448,547,225,750.99/6,978,845.49
  6. Step 6: Final answer
    x = 6,369,040.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.