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Finding the Fourth Proportional to 1,424,692.80, 1,966,075.20 and 851,731.20

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Solution

The fourth proportional to 1,424,692.80, 1,966,075.20 and 851,731.20 is: 1,175,388.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424,692.80 : 1,966,075.20 = 851,731.20 : x
  2. Step 2: Convert to fraction form
    1,424,692.80/1,966,075.20 = 851,731.20/x
  3. Step 3: Cross multiply
    1,424,692.80x = 1,966,075.20 × 851,731.20
  4. Step 4: Simplify right side
    1,424,692.80x = 1,674,567,589,386.24
  5. Step 5: Solve for x
    x = 1,674,567,589,386.24/1,424,692.80
  6. Step 6: Final answer
    x = 1,175,388.54

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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.