Finding the Fourth Proportional to 1,287,133,042.70, 1,930,699,564.05 and 425,490,034.70
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Solution
The fourth proportional to 1,287,133,042.70, 1,930,699,564.05 and 425,490,034.70 is: 638,235,052.05
Step by Step Solution
- Step 1: Write the proportion equation
1,287,133,042.70 : 1,930,699,564.05 = 425,490,034.70 : x - Step 2: Convert to fraction form
1,287,133,042.70/1,930,699,564.05 = 425,490,034.70/x - Step 3: Cross multiply
1,287,133,042.70x = 1,930,699,564.05 × 425,490,034.70 - Step 4: Simplify right side
1,287,133,042.70x = 821,493,424,502,909,312 - Step 5: Solve for x
x = 821,493,424,502,909,312/1,287,133,042.70 - Step 6: Final answer
x = 638,235,052.05
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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.