Finding the Fourth Proportional to 390,943.26, 586,298.25 and 138,177.09
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Solution
The fourth proportional to 390,943.26, 586,298.25 and 138,177.09 is: 207,224.41
Step by Step Solution
- Step 1: Write the proportion equation
390,943.26 : 586,298.25 = 138,177.09 : x - Step 2: Convert to fraction form
390,943.26/586,298.25 = 138,177.09/x - Step 3: Cross multiply
390,943.26x = 586,298.25 × 138,177.09 - Step 4: Simplify right side
390,943.26x = 81,012,986,057.09 - Step 5: Solve for x
x = 81,012,986,057.09/390,943.26 - Step 6: Final answer
x = 207,224.41
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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.