Finding the Fourth Proportional to 1,298,418.15, 1,791,909.77 and 717,628.80
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Solution
The fourth proportional to 1,298,418.15, 1,791,909.77 and 717,628.80 is: 990,378.99
Step by Step Solution
- Step 1: Write the proportion equation
1,298,418.15 : 1,791,909.77 = 717,628.80 : x - Step 2: Convert to fraction form
1,298,418.15/1,791,909.77 = 717,628.80/x - Step 3: Cross multiply
1,298,418.15x = 1,791,909.77 × 717,628.80 - Step 4: Simplify right side
1,298,418.15x = 1,285,926,054,365.23 - Step 5: Solve for x
x = 1,285,926,054,365.23/1,298,418.15 - Step 6: Final answer
x = 990,378.99
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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.