Home / 1,078,385.78-1,617,619.98-279,646.40

Finding the Fourth Proportional to 1,078,385.78, 1,617,619.98 and 279,646.40

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Solution

The fourth proportional to 1,078,385.78, 1,617,619.98 and 279,646.40 is: 419,480.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,385.78 : 1,617,619.98 = 279,646.40 : x
  2. Step 2: Convert to fraction form
    1,078,385.78/1,617,619.98 = 279,646.40/x
  3. Step 3: Cross multiply
    1,078,385.78x = 1,617,619.98 × 279,646.40
  4. Step 4: Simplify right side
    1,078,385.78x = 452,361,603,975.07
  5. Step 5: Solve for x
    x = 452,361,603,975.07/1,078,385.78
  6. Step 6: Final answer
    x = 419,480.31

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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.