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Finding the Fourth Proportional to 1,311,907.98, 1,968,019.65 and 1,240,163.46

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Solution

The fourth proportional to 1,311,907.98, 1,968,019.65 and 1,240,163.46 is: 1,860,394.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,907.98 : 1,968,019.65 = 1,240,163.46 : x
  2. Step 2: Convert to fraction form
    1,311,907.98/1,968,019.65 = 1,240,163.46/x
  3. Step 3: Cross multiply
    1,311,907.98x = 1,968,019.65 × 1,240,163.46
  4. Step 4: Simplify right side
    1,311,907.98x = 2,440,666,058,491.99
  5. Step 5: Solve for x
    x = 2,440,666,058,491.99/1,311,907.98
  6. Step 6: Final answer
    x = 1,860,394.25

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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.