Finding the Fourth Proportional to 715,767.12, 987,777.54 and 389,102.09
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Solution
The fourth proportional to 715,767.12, 987,777.54 and 389,102.09 is: 536,971.16
Step by Step Solution
- Step 1: Write the proportion equation
715,767.12 : 987,777.54 = 389,102.09 : x - Step 2: Convert to fraction form
715,767.12/987,777.54 = 389,102.09/x - Step 3: Cross multiply
715,767.12x = 987,777.54 × 389,102.09 - Step 4: Simplify right side
715,767.12x = 384,346,300,330.17 - Step 5: Solve for x
x = 384,346,300,330.17/715,767.12 - Step 6: Final answer
x = 536,971.16
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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.