Finding the Fourth Proportional to 279,909.36, 386,255.54 and 157,420.08
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Solution
The fourth proportional to 279,909.36, 386,255.54 and 157,420.08 is: 217,228.81
Step by Step Solution
- Step 1: Write the proportion equation
279,909.36 : 386,255.54 = 157,420.08 : x - Step 2: Convert to fraction form
279,909.36/386,255.54 = 157,420.08/x - Step 3: Cross multiply
279,909.36x = 386,255.54 × 157,420.08 - Step 4: Simplify right side
279,909.36x = 60,804,378,007.24 - Step 5: Solve for x
x = 60,804,378,007.24/279,909.36 - Step 6: Final answer
x = 217,228.81
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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.