Finding the Fourth Proportional to 1,515,085,489,613.80, 2,090,801,319,125 and 820,608,771,332.55
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Solution
The fourth proportional to 1,515,085,489,613.80, 2,090,801,319,125 and 820,608,771,332.55 is: 1,132,431,082,832.82
Step by Step Solution
- Step 1: Write the proportion equation
1,515,085,489,613.80 : 2,090,801,319,125 = 820,608,771,332.55 : x - Step 2: Convert to fraction form
1,515,085,489,613.80/2,090,801,319,125 = 820,608,771,332.55/x - Step 3: Cross multiply
1,515,085,489,613.80x = 2,090,801,319,125 × 820,608,771,332.55 - Step 4: Simplify right side
1,515,085,489,613.80x = 1,715,729,901,587,641,111,937,024 - Step 5: Solve for x
x = 1,715,729,901,587,641,111,937,024/1,515,085,489,613.80 - Step 6: Final answer
x = 1,132,431,082,832.82
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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.