Finding the Fourth Proportional to 390,053,326.14, 538,273,460.16 and 213,837,542.55
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Solution
The fourth proportional to 390,053,326.14, 538,273,460.16 and 213,837,542.55 is: 295,095,737.50
Step by Step Solution
- Step 1: Write the proportion equation
390,053,326.14 : 538,273,460.16 = 213,837,542.55 : x - Step 2: Convert to fraction form
390,053,326.14/538,273,460.16 = 213,837,542.55/x - Step 3: Cross multiply
390,053,326.14x = 538,273,460.16 × 213,837,542.55 - Step 4: Simplify right side
390,053,326.14x = 115,103,073,940,499,728 - Step 5: Solve for x
x = 115,103,073,940,499,728/390,053,326.14 - Step 6: Final answer
x = 295,095,737.50
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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.