Finding the Fourth Proportional to 1,398,679,568.49, 1,930,127,203.80 and 772,134,543.12
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Solution
The fourth proportional to 1,398,679,568.49, 1,930,127,203.80 and 772,134,543.12 is: 1,065,517,735.62
Step by Step Solution
- Step 1: Write the proportion equation
1,398,679,568.49 : 1,930,127,203.80 = 772,134,543.12 : x - Step 2: Convert to fraction form
1,398,679,568.49/1,930,127,203.80 = 772,134,543.12/x - Step 3: Cross multiply
1,398,679,568.49x = 1,930,127,203.80 × 772,134,543.12 - Step 4: Simplify right side
1,398,679,568.49x = 1,490,317,886,669,596,160 - Step 5: Solve for x
x = 1,490,317,886,669,596,160/1,398,679,568.49 - Step 6: Final answer
x = 1,065,517,735.62
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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.