Finding the Fourth Proportional to 1,117,728,140.70, 1,676,592,211.05 and 390,641,036.70
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Solution
The fourth proportional to 1,117,728,140.70, 1,676,592,211.05 and 390,641,036.70 is: 585,961,555.05
Step by Step Solution
- Step 1: Write the proportion equation
1,117,728,140.70 : 1,676,592,211.05 = 390,641,036.70 : x - Step 2: Convert to fraction form
1,117,728,140.70/1,676,592,211.05 = 390,641,036.70/x - Step 3: Cross multiply
1,117,728,140.70x = 1,676,592,211.05 × 390,641,036.70 - Step 4: Simplify right side
1,117,728,140.70x = 654,945,719,447,717,120 - Step 5: Solve for x
x = 654,945,719,447,717,120/1,117,728,140.70 - Step 6: Final answer
x = 585,961,555.05
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Double scale
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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.