Finding the Fourth Proportional to 1,175,396,775.22, 1,621,998,918.38 and 639,550,645.70
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Solution
The fourth proportional to 1,175,396,775.22, 1,621,998,918.38 and 639,550,645.70 is: 882,553,429.99
Step by Step Solution
- Step 1: Write the proportion equation
1,175,396,775.22 : 1,621,998,918.38 = 639,550,645.70 : x - Step 2: Convert to fraction form
1,175,396,775.22/1,621,998,918.38 = 639,550,645.70/x - Step 3: Cross multiply
1,175,396,775.22x = 1,621,998,918.38 × 639,550,645.70 - Step 4: Simplify right side
1,175,396,775.22x = 1,037,350,455,574,630,784 - Step 5: Solve for x
x = 1,037,350,455,574,630,784/1,175,396,775.22 - Step 6: Final answer
x = 882,553,429.99
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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.