Finding the Fourth Proportional to 278,836,118.55, 384,791,716.78 and 153,385,614.09
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Solution
The fourth proportional to 278,836,118.55, 384,791,716.78 and 153,385,614.09 is: 211,670,977.50
Step by Step Solution
- Step 1: Write the proportion equation
278,836,118.55 : 384,791,716.78 = 153,385,614.09 : x - Step 2: Convert to fraction form
278,836,118.55/384,791,716.78 = 153,385,614.09/x - Step 3: Cross multiply
278,836,118.55x = 384,791,716.78 × 153,385,614.09 - Step 4: Simplify right side
278,836,118.55x = 59,021,513,775,045,656 - Step 5: Solve for x
x = 59,021,513,775,045,656/278,836,118.55 - Step 6: Final answer
x = 211,670,977.50
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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.