Finding the Fourth Proportional to 643,888.94, 888,386.67 and 402,416.80
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Solution
The fourth proportional to 643,888.94, 888,386.67 and 402,416.80 is: 555,222.65
Step by Step Solution
- Step 1: Write the proportion equation
643,888.94 : 888,386.67 = 402,416.80 : x - Step 2: Convert to fraction form
643,888.94/888,386.67 = 402,416.80/x - Step 3: Cross multiply
643,888.94x = 888,386.67 × 402,416.80 - Step 4: Simplify right side
643,888.94x = 357,501,718,683.09 - Step 5: Solve for x
x = 357,501,718,683.09/643,888.94 - Step 6: Final answer
x = 555,222.65
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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.