Finding the Fourth Proportional to 390,279.36, 538,596.16 and 220,510.08
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Solution
The fourth proportional to 390,279.36, 538,596.16 and 220,510.08 is: 304,309.92
Step by Step Solution
- Step 1: Write the proportion equation
390,279.36 : 538,596.16 = 220,510.08 : x - Step 2: Convert to fraction form
390,279.36/538,596.16 = 220,510.08/x - Step 3: Cross multiply
390,279.36x = 538,596.16 × 220,510.08 - Step 4: Simplify right side
390,279.36x = 118,765,882,329.29 - Step 5: Solve for x
x = 118,765,882,329.29/390,279.36 - Step 6: Final answer
x = 304,309.92
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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.