Finding the Fourth Proportional to 257,990.81, 386,972.55 and 80,477.48
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Solution
The fourth proportional to 257,990.81, 386,972.55 and 80,477.48 is: 120,711.96
Step by Step Solution
- Step 1: Write the proportion equation
257,990.81 : 386,972.55 = 80,477.48 : x - Step 2: Convert to fraction form
257,990.81/386,972.55 = 80,477.48/x - Step 3: Cross multiply
257,990.81x = 386,972.55 × 80,477.48 - Step 4: Simplify right side
257,990.81x = 31,142,575,653.17 - Step 5: Solve for x
x = 31,142,575,653.17/257,990.81 - Step 6: Final answer
x = 120,711.96
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.