Finding the Fourth Proportional to 1,389,968,110.26, 1,918,274,289.84 and 787,245,953.04
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Solution
The fourth proportional to 1,389,968,110.26, 1,918,274,289.84 and 787,245,953.04 is: 1,086,466,416.28
Step by Step Solution
- Step 1: Write the proportion equation
1,389,968,110.26 : 1,918,274,289.84 = 787,245,953.04 : x - Step 2: Convert to fraction form
1,389,968,110.26/1,918,274,289.84 = 787,245,953.04/x - Step 3: Cross multiply
1,389,968,110.26x = 1,918,274,289.84 × 787,245,953.04 - Step 4: Simplify right side
1,389,968,110.26x = 1,510,153,671,497,219,840 - Step 5: Solve for x
x = 1,510,153,671,497,219,840/1,389,968,110.26 - Step 6: Final answer
x = 1,086,466,416.28
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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.