Finding the Fourth Proportional to 390,125.09, 538,224.26 and 288,394.81
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Solution
The fourth proportional to 390,125.09, 538,224.26 and 288,394.81 is: 397,875.15
Step by Step Solution
- Step 1: Write the proportion equation
390,125.09 : 538,224.26 = 288,394.81 : x - Step 2: Convert to fraction form
390,125.09/538,224.26 = 288,394.81/x - Step 3: Cross multiply
390,125.09x = 538,224.26 × 288,394.81 - Step 4: Simplify right side
390,125.09x = 155,221,080,412.56 - Step 5: Solve for x
x = 155,221,080,412.56/390,125.09 - Step 6: Final answer
x = 397,875.15
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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.