Finding the Fourth Proportional to 390,176.90, 538,487.82 and 220,421.96
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Solution
The fourth proportional to 390,176.90, 538,487.82 and 220,421.96 is: 304,206.99
Step by Step Solution
- Step 1: Write the proportion equation
390,176.90 : 538,487.82 = 220,421.96 : x - Step 2: Convert to fraction form
390,176.90/538,487.82 = 220,421.96/x - Step 3: Cross multiply
390,176.90x = 538,487.82 × 220,421.96 - Step 4: Simplify right side
390,176.90x = 118,694,540,720.53 - Step 5: Solve for x
x = 118,694,540,720.53/390,176.90 - Step 6: Final answer
x = 304,206.99
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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.