Home / 1,290,135.44-1,780,308.84-717,155.60

Finding the Fourth Proportional to 1,290,135.44, 1,780,308.84 and 717,155.60

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Solution

The fourth proportional to 1,290,135.44, 1,780,308.84 and 717,155.60 is: 989,631.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,135.44 : 1,780,308.84 = 717,155.60 : x
  2. Step 2: Convert to fraction form
    1,290,135.44/1,780,308.84 = 717,155.60/x
  3. Step 3: Cross multiply
    1,290,135.44x = 1,780,308.84 × 717,155.60
  4. Step 4: Simplify right side
    1,290,135.44x = 1,276,758,454,335.50
  5. Step 5: Solve for x
    x = 1,276,758,454,335.50/1,290,135.44
  6. Step 6: Final answer
    x = 989,631.33

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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.