Finding the Fourth Proportional to 1,290,927.70, 1,781,543.34 and 717,955.58
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Solution
The fourth proportional to 1,290,927.70, 1,781,543.34 and 717,955.58 is: 990,813.80
Step by Step Solution
- Step 1: Write the proportion equation
1,290,927.70 : 1,781,543.34 = 717,955.58 : x - Step 2: Convert to fraction form
1,290,927.70/1,781,543.34 = 717,955.58/x - Step 3: Cross multiply
1,290,927.70x = 1,781,543.34 × 717,955.58 - Step 4: Simplify right side
1,290,927.70x = 1,279,068,981,964.84 - Step 5: Solve for x
x = 1,279,068,981,964.84/1,290,927.70 - Step 6: Final answer
x = 990,813.80
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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.