Finding the Fourth Proportional to 1,247,646,895.48, 1,721,753,132.30 and 683,167,478.68
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Solution
The fourth proportional to 1,247,646,895.48, 1,721,753,132.30 and 683,167,478.68 is: 942,771,348.66
Step by Step Solution
- Step 1: Write the proportion equation
1,247,646,895.48 : 1,721,753,132.30 = 683,167,478.68 : x - Step 2: Convert to fraction form
1,247,646,895.48/1,721,753,132.30 = 683,167,478.68/x - Step 3: Cross multiply
1,247,646,895.48x = 1,721,753,132.30 × 683,167,478.68 - Step 4: Simplify right side
1,247,646,895.48x = 1,176,245,746,302,783,232 - Step 5: Solve for x
x = 1,176,245,746,302,783,232/1,247,646,895.48 - Step 6: Final answer
x = 942,771,348.66
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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.