Home / 1,440,056,629-1,987,278,216.06-780,006,907

Finding the Fourth Proportional to 1,440,056,629, 1,987,278,216.06 and 780,006,907

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Solution

The fourth proportional to 1,440,056,629, 1,987,278,216.06 and 780,006,907 is: 1,076,409,568.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440,056,629 : 1,987,278,216.06 = 780,006,907 : x
  2. Step 2: Convert to fraction form
    1,440,056,629/1,987,278,216.06 = 780,006,907/x
  3. Step 3: Cross multiply
    1,440,056,629x = 1,987,278,216.06 × 780,006,907
  4. Step 4: Simplify right side
    1,440,056,629x = 1,550,090,734,657,438,208
  5. Step 5: Solve for x
    x = 1,550,090,734,657,438,208/1,440,056,629
  6. Step 6: Final answer
    x = 1,076,409,568.51

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1.5x scale

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.