Finding the Fourth Proportional to 720,465,472.64, 994,243,202.70 and 390,440,611.64
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Solution
The fourth proportional to 720,465,472.64, 994,243,202.70 and 390,440,611.64 is: 538,808,504.95
Step by Step Solution
- Step 1: Write the proportion equation
720,465,472.64 : 994,243,202.70 = 390,440,611.64 : x - Step 2: Convert to fraction form
720,465,472.64/994,243,202.70 = 390,440,611.64/x - Step 3: Cross multiply
720,465,472.64x = 994,243,202.70 × 390,440,611.64 - Step 4: Simplify right side
720,465,472.64x = 388,192,924,181,100,480 - Step 5: Solve for x
x = 388,192,924,181,100,480/720,465,472.64 - Step 6: Final answer
x = 538,808,504.95
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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.