Finding the Fourth Proportional to 1,278,779,207.58, 1,764,696,679.02 and 714,272,121.90
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Solution
The fourth proportional to 1,278,779,207.58, 1,764,696,679.02 and 714,272,121.90 is: 985,685,123.72
Step by Step Solution
- Step 1: Write the proportion equation
1,278,779,207.58 : 1,764,696,679.02 = 714,272,121.90 : x - Step 2: Convert to fraction form
1,278,779,207.58/1,764,696,679.02 = 714,272,121.90/x - Step 3: Cross multiply
1,278,779,207.58x = 1,764,696,679.02 × 714,272,121.90 - Step 4: Simplify right side
1,278,779,207.58x = 1,260,473,641,433,498,624 - Step 5: Solve for x
x = 1,260,473,641,433,498,624/1,278,779,207.58 - Step 6: Final answer
x = 985,685,123.72
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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.