Finding the Fourth Proportional to 390,141.75, 538,395.62 and 211,293.75
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Solution
The fourth proportional to 390,141.75, 538,395.62 and 211,293.75 is: 291,585.38
Step by Step Solution
- Step 1: Write the proportion equation
390,141.75 : 538,395.62 = 211,293.75 : x - Step 2: Convert to fraction form
390,141.75/538,395.62 = 211,293.75/x - Step 3: Cross multiply
390,141.75x = 538,395.62 × 211,293.75 - Step 4: Simplify right side
390,141.75x = 113,759,628,476.91 - Step 5: Solve for x
x = 113,759,628,476.91/390,141.75 - Step 6: Final answer
x = 291,585.38
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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.