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Finding the Fourth Proportional to 3,611,907.33, 4,984,405.77 and 1,980,287.78

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Solution

The fourth proportional to 3,611,907.33, 4,984,405.77 and 1,980,287.78 is: 2,732,782.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611,907.33 : 4,984,405.77 = 1,980,287.78 : x
  2. Step 2: Convert to fraction form
    3,611,907.33/4,984,405.77 = 1,980,287.78/x
  3. Step 3: Cross multiply
    3,611,907.33x = 4,984,405.77 × 1,980,287.78
  4. Step 4: Simplify right side
    3,611,907.33x = 9,870,557,849,353.50
  5. Step 5: Solve for x
    x = 9,870,557,849,353.50/3,611,907.33
  6. Step 6: Final answer
    x = 2,732,782.70

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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.