Finding the Fourth Proportional to 268,436.69, 402,655.12 and 78,897.09
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Solution
The fourth proportional to 268,436.69, 402,655.12 and 78,897.09 is: 118,345.66
Step by Step Solution
- Step 1: Write the proportion equation
268,436.69 : 402,655.12 = 78,897.09 : x - Step 2: Convert to fraction form
268,436.69/402,655.12 = 78,897.09/x - Step 3: Cross multiply
268,436.69x = 402,655.12 × 78,897.09 - Step 4: Simplify right side
268,436.69x = 31,768,316,455.80 - Step 5: Solve for x
x = 31,768,316,455.80/268,436.69 - Step 6: Final answer
x = 118,345.66
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.