Finding the Fourth Proportional to 1,328,575,329.20, 1,992,862,993.80 and 638,316,138.80
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Solution
The fourth proportional to 1,328,575,329.20, 1,992,862,993.80 and 638,316,138.80 is: 957,474,208.20
Step by Step Solution
- Step 1: Write the proportion equation
1,328,575,329.20 : 1,992,862,993.80 = 638,316,138.80 : x - Step 2: Convert to fraction form
1,328,575,329.20/1,992,862,993.80 = 638,316,138.80/x - Step 3: Cross multiply
1,328,575,329.20x = 1,992,862,993.80 × 638,316,138.80 - Step 4: Simplify right side
1,328,575,329.20x = 1,272,076,611,359,824,128 - Step 5: Solve for x
x = 1,272,076,611,359,824,128/1,328,575,329.20 - Step 6: Final answer
x = 957,474,208.20
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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.