Finding the Fourth Proportional to 1,021,620,565.90, 1,409,836,327.05 and 551,721,841.75
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Solution
The fourth proportional to 1,021,620,565.90, 1,409,836,327.05 and 551,721,841.75 is: 761,376,112.51
Step by Step Solution
- Step 1: Write the proportion equation
1,021,620,565.90 : 1,409,836,327.05 = 551,721,841.75 : x - Step 2: Convert to fraction form
1,021,620,565.90/1,409,836,327.05 = 551,721,841.75/x - Step 3: Cross multiply
1,021,620,565.90x = 1,409,836,327.05 × 551,721,841.75 - Step 4: Simplify right side
1,021,620,565.90x = 777,837,494,926,081,280 - Step 5: Solve for x
x = 777,837,494,926,081,280/1,021,620,565.90 - Step 6: Final answer
x = 761,376,112.51
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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.