Finding the Fourth Proportional to 1,216,084,187,642.20, 1,678,085,255,986.60 and 721,603,526,117.53
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Solution
The fourth proportional to 1,216,084,187,642.20, 1,678,085,255,986.60 and 721,603,526,117.53 is: 995,747,046,257.99
Step by Step Solution
- Step 1: Write the proportion equation
1,216,084,187,642.20 : 1,678,085,255,986.60 = 721,603,526,117.53 : x - Step 2: Convert to fraction form
1,216,084,187,642.20/1,678,085,255,986.60 = 721,603,526,117.53/x - Step 3: Cross multiply
1,216,084,187,642.20x = 1,678,085,255,986.60 × 721,603,526,117.53 - Step 4: Simplify right side
1,216,084,187,642.20x = 1,210,912,237,845,768,713,535,488 - Step 5: Solve for x
x = 1,210,912,237,845,768,713,535,488/1,216,084,187,642.20 - Step 6: Final answer
x = 995,747,046,257.99
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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.