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Finding the Fourth Proportional to 708,588,604.80, 989,728,221.60 and 708,588,604.80

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Solution

The fourth proportional to 708,588,604.80, 989,728,221.60 and 708,588,604.80 is: 989,728,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,588,604.80 : 989,728,221.60 = 708,588,604.80 : x
  2. Step 2: Convert to fraction form
    708,588,604.80/989,728,221.60 = 708,588,604.80/x
  3. Step 3: Cross multiply
    708,588,604.80x = 989,728,221.60 × 708,588,604.80
  4. Step 4: Simplify right side
    708,588,604.80x = 701,310,139,674,729,216
  5. Step 5: Solve for x
    x = 701,310,139,674,729,216/708,588,604.80
  6. Step 6: Final answer
    x = 989,728,221.60

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Double scale
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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.