Finding the Fourth Proportional to 1,278,278,497.91, 1,915,722,671.40 and 656,468,613.06
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Solution
The fourth proportional to 1,278,278,497.91, 1,915,722,671.40 and 656,468,613.06 is: 983,832,402.06
Step by Step Solution
- Step 1: Write the proportion equation
1,278,278,497.91 : 1,915,722,671.40 = 656,468,613.06 : x - Step 2: Convert to fraction form
1,278,278,497.91/1,915,722,671.40 = 656,468,613.06/x - Step 3: Cross multiply
1,278,278,497.91x = 1,915,722,671.40 × 656,468,613.06 - Step 4: Simplify right side
1,278,278,497.91x = 1,257,611,805,101,555,968 - Step 5: Solve for x
x = 1,257,611,805,101,555,968/1,278,278,497.91 - Step 6: Final answer
x = 983,832,402.06
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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.