Finding the Fourth Proportional to 778,045,431.36, 1,073,699,485.29 and 420,813,606.72
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Solution
The fourth proportional to 778,045,431.36, 1,073,699,485.29 and 420,813,606.72 is: 580,721,041.12
Step by Step Solution
- Step 1: Write the proportion equation
778,045,431.36 : 1,073,699,485.29 = 420,813,606.72 : x - Step 2: Convert to fraction form
778,045,431.36/1,073,699,485.29 = 420,813,606.72/x - Step 3: Cross multiply
778,045,431.36x = 1,073,699,485.29 × 420,813,606.72 - Step 4: Simplify right side
778,045,431.36x = 451,827,352,938,292,480 - Step 5: Solve for x
x = 451,827,352,938,292,480/778,045,431.36 - Step 6: Final answer
x = 580,721,041.12
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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.