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Finding the Fourth Proportional to 708,589,065.80, 989,728,867 and 708,589,065.80

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Solution

The fourth proportional to 708,589,065.80, 989,728,867 and 708,589,065.80 is: 989,728,867

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,589,065.80 : 989,728,867 = 708,589,065.80 : x
  2. Step 2: Convert to fraction form
    708,589,065.80/989,728,867 = 708,589,065.80/x
  3. Step 3: Cross multiply
    708,589,065.80x = 989,728,867 × 708,589,065.80
  4. Step 4: Simplify right side
    708,589,065.80x = 701,311,053,262,822,400
  5. Step 5: Solve for x
    x = 701,311,053,262,822,400/708,589,065.80
  6. Step 6: Final answer
    x = 989,728,867

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.