Finding the Fourth Proportional to 390,509.91, 538,888.95 and 220,747.68
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Solution
The fourth proportional to 390,509.91, 538,888.95 and 220,747.68 is: 304,623.47
Step by Step Solution
- Step 1: Write the proportion equation
390,509.91 : 538,888.95 = 220,747.68 : x - Step 2: Convert to fraction form
390,509.91/538,888.95 = 220,747.68/x - Step 3: Cross multiply
390,509.91x = 538,888.95 × 220,747.68 - Step 4: Simplify right side
390,509.91x = 118,958,485,490.14 - Step 5: Solve for x
x = 118,958,485,490.14/390,509.91 - Step 6: Final answer
x = 304,623.47
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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.