Home / 1,287,077.80-1,930,607.10-388,517.80

Finding the Fourth Proportional to 1,287,077.80, 1,930,607.10 and 388,517.80

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Solution

The fourth proportional to 1,287,077.80, 1,930,607.10 and 388,517.80 is: 582,773.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,077.80 : 1,930,607.10 = 388,517.80 : x
  2. Step 2: Convert to fraction form
    1,287,077.80/1,930,607.10 = 388,517.80/x
  3. Step 3: Cross multiply
    1,287,077.80x = 1,930,607.10 × 388,517.80
  4. Step 4: Simplify right side
    1,287,077.80x = 750,075,223,156.38
  5. Step 5: Solve for x
    x = 750,075,223,156.38/1,287,077.80
  6. Step 6: Final answer
    x = 582,773.80

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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.