Home / 1,278,758.40-1,915,603.20-1,121,164.80

Finding the Fourth Proportional to 1,278,758.40, 1,915,603.20 and 1,121,164.80

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Solution

The fourth proportional to 1,278,758.40, 1,915,603.20 and 1,121,164.80 is: 1,679,525.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,758.40 : 1,915,603.20 = 1,121,164.80 : x
  2. Step 2: Convert to fraction form
    1,278,758.40/1,915,603.20 = 1,121,164.80/x
  3. Step 3: Cross multiply
    1,278,758.40x = 1,915,603.20 × 1,121,164.80
  4. Step 4: Simplify right side
    1,278,758.40x = 2,147,706,878,607.36
  5. Step 5: Solve for x
    x = 2,147,706,878,607.36/1,278,758.40
  6. Step 6: Final answer
    x = 1,679,525.14

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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.