Finding the Fourth Proportional to 1,212,278,117.99, 1,672,818,356.21 and 894,906,867.20
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Solution
The fourth proportional to 1,212,278,117.99, 1,672,818,356.21 and 894,906,867.20 is: 1,234,878,871.71
Step by Step Solution
- Step 1: Write the proportion equation
1,212,278,117.99 : 1,672,818,356.21 = 894,906,867.20 : x - Step 2: Convert to fraction form
1,212,278,117.99/1,672,818,356.21 = 894,906,867.20/x - Step 3: Cross multiply
1,212,278,117.99x = 1,672,818,356.21 × 894,906,867.20 - Step 4: Simplify right side
1,212,278,117.99x = 1,497,016,634,537,706,240 - Step 5: Solve for x
x = 1,497,016,634,537,706,240/1,212,278,117.99 - Step 6: Final answer
x = 1,234,878,871.71
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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.