Finding the Fourth Proportional to 979,869,962.70, 1,469,804,944.05 and 905,043,069.90
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Solution
The fourth proportional to 979,869,962.70, 1,469,804,944.05 and 905,043,069.90 is: 1,357,564,604.85
Step by Step Solution
- Step 1: Write the proportion equation
979,869,962.70 : 1,469,804,944.05 = 905,043,069.90 : x - Step 2: Convert to fraction form
979,869,962.70/1,469,804,944.05 = 905,043,069.90/x - Step 3: Cross multiply
979,869,962.70x = 1,469,804,944.05 × 905,043,069.90 - Step 4: Simplify right side
979,869,962.70x = 1,330,236,778,717,209,600 - Step 5: Solve for x
x = 1,330,236,778,717,209,600/979,869,962.70 - Step 6: Final answer
x = 1,357,564,604.85
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1.5x scale
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.