Finding the Fourth Proportional to 7,178,955.90, 9,906,990.17 and 3,915,840.66
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Solution
The fourth proportional to 7,178,955.90, 9,906,990.17 and 3,915,840.66 is: 5,403,877.03
Step by Step Solution
- Step 1: Write the proportion equation
7,178,955.90 : 9,906,990.17 = 3,915,840.66 : x - Step 2: Convert to fraction form
7,178,955.90/9,906,990.17 = 3,915,840.66/x - Step 3: Cross multiply
7,178,955.90x = 9,906,990.17 × 3,915,840.66 - Step 4: Simplify right side
7,178,955.90x = 38,794,194,906,327.11 - Step 5: Solve for x
x = 38,794,194,906,327.11/7,178,955.90 - Step 6: Final answer
x = 5,403,877.03
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1.5x scale
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.