Finding the Fourth Proportional to 1,290,930.40, 1,781,506.84 and 717,970.84
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Solution
The fourth proportional to 1,290,930.40, 1,781,506.84 and 717,970.84 is: 990,812.49
Step by Step Solution
- Step 1: Write the proportion equation
1,290,930.40 : 1,781,506.84 = 717,970.84 : x - Step 2: Convert to fraction form
1,290,930.40/1,781,506.84 = 717,970.84/x - Step 3: Cross multiply
1,290,930.40x = 1,781,506.84 × 717,970.84 - Step 4: Simplify right side
1,290,930.40x = 1,279,069,962,380.55 - Step 5: Solve for x
x = 1,279,069,962,380.55/1,290,930.40 - Step 6: Final answer
x = 990,812.49
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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.