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Finding the Fourth Proportional to 3,985,804,978.60, 5,978,707,467.90 and 1,225,075,271.80

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Solution

The fourth proportional to 3,985,804,978.60, 5,978,707,467.90 and 1,225,075,271.80 is: 1,837,612,907.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985,804,978.60 : 5,978,707,467.90 = 1,225,075,271.80 : x
  2. Step 2: Convert to fraction form
    3,985,804,978.60/5,978,707,467.90 = 1,225,075,271.80/x
  3. Step 3: Cross multiply
    3,985,804,978.60x = 5,978,707,467.90 × 1,225,075,271.80
  4. Step 4: Simplify right side
    3,985,804,978.60x = 7,324,366,676,250,281,984
  5. Step 5: Solve for x
    x = 7,324,366,676,250,281,984/3,985,804,978.60
  6. Step 6: Final answer
    x = 1,837,612,907.70

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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.