Finding the Fourth Proportional to 1,281,371,821.80, 1,922,057,732.70 and 312,023,437.80
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Solution
The fourth proportional to 1,281,371,821.80, 1,922,057,732.70 and 312,023,437.80 is: 468,035,156.70
Step by Step Solution
- Step 1: Write the proportion equation
1,281,371,821.80 : 1,922,057,732.70 = 312,023,437.80 : x - Step 2: Convert to fraction form
1,281,371,821.80/1,922,057,732.70 = 312,023,437.80/x - Step 3: Cross multiply
1,281,371,821.80x = 1,922,057,732.70 × 312,023,437.80 - Step 4: Simplify right side
1,281,371,821.80x = 599,727,061,407,127,552 - Step 5: Solve for x
x = 599,727,061,407,127,552/1,281,371,821.80 - Step 6: Final answer
x = 468,035,156.70
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.