Finding the Fourth Proportional to 390,336.12, 538,664.46 and 211,488.12
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Solution
The fourth proportional to 390,336.12, 538,664.46 and 211,488.12 is: 291,853.94
Step by Step Solution
- Step 1: Write the proportion equation
390,336.12 : 538,664.46 = 211,488.12 : x - Step 2: Convert to fraction form
390,336.12/538,664.46 = 211,488.12/x - Step 3: Cross multiply
390,336.12x = 538,664.46 × 211,488.12 - Step 4: Simplify right side
390,336.12x = 113,921,133,956.22 - Step 5: Solve for x
x = 113,921,133,956.22/390,336.12 - Step 6: Final answer
x = 291,853.94
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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.