Finding the Fourth Proportional to 408,781.08, 613,170.50 and 128,319.32
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Solution
The fourth proportional to 408,781.08, 613,170.50 and 128,319.32 is: 192,478.63
Step by Step Solution
- Step 1: Write the proportion equation
408,781.08 : 613,170.50 = 128,319.32 : x - Step 2: Convert to fraction form
408,781.08/613,170.50 = 128,319.32/x - Step 3: Cross multiply
408,781.08x = 613,170.50 × 128,319.32 - Step 4: Simplify right side
408,781.08x = 78,681,621,604.06 - Step 5: Solve for x
x = 78,681,621,604.06/408,781.08 - Step 6: Final answer
x = 192,478.63
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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.