Finding the Fourth Proportional to 287,878.69, 431,239.73 and 143,349.09
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Solution
The fourth proportional to 287,878.69, 431,239.73 and 143,349.09 is: 214,735.66
Step by Step Solution
- Step 1: Write the proportion equation
287,878.69 : 431,239.73 = 143,349.09 : x - Step 2: Convert to fraction form
287,878.69/431,239.73 = 143,349.09/x - Step 3: Cross multiply
287,878.69x = 431,239.73 × 143,349.09 - Step 4: Simplify right side
287,878.69x = 61,817,819,994.40 - Step 5: Solve for x
x = 61,817,819,994.40/287,878.69 - Step 6: Final answer
x = 214,735.66
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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.