Finding the Fourth Proportional to 257,516.20, 386,274.30 and 145,541.80
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Solution
The fourth proportional to 257,516.20, 386,274.30 and 145,541.80 is: 218,312.70
Step by Step Solution
- Step 1: Write the proportion equation
257,516.20 : 386,274.30 = 145,541.80 : x - Step 2: Convert to fraction form
257,516.20/386,274.30 = 145,541.80/x - Step 3: Cross multiply
257,516.20x = 386,274.30 × 145,541.80 - Step 4: Simplify right side
257,516.20x = 56,219,056,915.74 - Step 5: Solve for x
x = 56,219,056,915.74/257,516.20 - Step 6: Final answer
x = 218,312.70
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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.