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Finding the Fourth Proportional to 1,439,673,986.72, 1,986,752,017.68 and 779,625,403.04

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Solution

The fourth proportional to 1,439,673,986.72, 1,986,752,017.68 and 779,625,403.04 is: 1,075,884,093.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439,673,986.72 : 1,986,752,017.68 = 779,625,403.04 : x
  2. Step 2: Convert to fraction form
    1,439,673,986.72/1,986,752,017.68 = 779,625,403.04/x
  3. Step 3: Cross multiply
    1,439,673,986.72x = 1,986,752,017.68 × 779,625,403.04
  4. Step 4: Simplify right side
    1,439,673,986.72x = 1,548,922,342,524,303,104
  5. Step 5: Solve for x
    x = 1,548,922,342,524,303,104/1,439,673,986.72
  6. Step 6: Final answer
    x = 1,075,884,093.77

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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.