Finding the Fourth Proportional to 408,590.68, 612,886.02 and 128,129.80
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Solution
The fourth proportional to 408,590.68, 612,886.02 and 128,129.80 is: 192,194.70
Step by Step Solution
- Step 1: Write the proportion equation
408,590.68 : 612,886.02 = 128,129.80 : x - Step 2: Convert to fraction form
408,590.68/612,886.02 = 128,129.80/x - Step 3: Cross multiply
408,590.68x = 612,886.02 × 128,129.80 - Step 4: Simplify right side
408,590.68x = 78,528,963,165.40 - Step 5: Solve for x
x = 78,528,963,165.40/408,590.68 - Step 6: Final answer
x = 192,194.70
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1.5x scale
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.