Finding the Fourth Proportional to 278,781.79, 384,737.89 and 157,924.07
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Solution
The fourth proportional to 278,781.79, 384,737.89 and 157,924.07 is: 217,945.99
Step by Step Solution
- Step 1: Write the proportion equation
278,781.79 : 384,737.89 = 157,924.07 : x - Step 2: Convert to fraction form
278,781.79/384,737.89 = 157,924.07/x - Step 3: Cross multiply
278,781.79x = 384,737.89 × 157,924.07 - Step 4: Simplify right side
278,781.79x = 60,759,373,128.63 - Step 5: Solve for x
x = 60,759,373,128.63/278,781.79 - Step 6: Final answer
x = 217,945.99
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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.