Finding the Fourth Proportional to 390,325,857.36, 538,644,657.84 and 223,060,203.18
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Solution
The fourth proportional to 390,325,857.36, 538,644,657.84 and 223,060,203.18 is: 307,820,208.56
Step by Step Solution
- Step 1: Write the proportion equation
390,325,857.36 : 538,644,657.84 = 223,060,203.18 : x - Step 2: Convert to fraction form
390,325,857.36/538,644,657.84 = 223,060,203.18/x - Step 3: Cross multiply
390,325,857.36x = 538,644,657.84 × 223,060,203.18 - Step 4: Simplify right side
390,325,857.36x = 120,150,186,819,611,984 - Step 5: Solve for x
x = 120,150,186,819,611,984/390,325,857.36 - Step 6: Final answer
x = 307,820,208.56
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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.