Finding the Fourth Proportional to 399,340.25, 551,111.99 and 218,069.09
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Solution
The fourth proportional to 399,340.25, 551,111.99 and 218,069.09 is: 300,947.60
Step by Step Solution
- Step 1: Write the proportion equation
399,340.25 : 551,111.99 = 218,069.09 : x - Step 2: Convert to fraction form
399,340.25/551,111.99 = 218,069.09/x - Step 3: Cross multiply
399,340.25x = 551,111.99 × 218,069.09 - Step 4: Simplify right side
399,340.25x = 120,180,490,147.39 - Step 5: Solve for x
x = 120,180,490,147.39/399,340.25 - Step 6: Final answer
x = 300,947.60
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1.5x scale
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.