Finding the Fourth Proportional to 390,812.26, 586,288.59 and 138,239.14
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Solution
The fourth proportional to 390,812.26, 586,288.59 and 138,239.14 is: 207,383.54
Step by Step Solution
- Step 1: Write the proportion equation
390,812.26 : 586,288.59 = 138,239.14 : x - Step 2: Convert to fraction form
390,812.26/586,288.59 = 138,239.14/x - Step 3: Cross multiply
390,812.26x = 586,288.59 × 138,239.14 - Step 4: Simplify right side
390,812.26x = 81,048,030,473.41 - Step 5: Solve for x
x = 81,048,030,473.41/390,812.26 - Step 6: Final answer
x = 207,383.54
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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.