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Finding the Fourth Proportional to 3,420,692.07, 5,131,836.20 and 991,895.98

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Solution

The fourth proportional to 3,420,692.07, 5,131,836.20 and 991,895.98 is: 1,488,075.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420,692.07 : 5,131,836.20 = 991,895.98 : x
  2. Step 2: Convert to fraction form
    3,420,692.07/5,131,836.20 = 991,895.98/x
  3. Step 3: Cross multiply
    3,420,692.07x = 5,131,836.20 × 991,895.98
  4. Step 4: Simplify right side
    3,420,692.07x = 5,090,247,696,070.82
  5. Step 5: Solve for x
    x = 5,090,247,696,070.82/3,420,692.07
  6. Step 6: Final answer
    x = 1,488,075.39

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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.