Finding the Fourth Proportional to 390,498,927.72, 538,896,750.84 and 214,285,381.44
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Solution
The fourth proportional to 390,498,927.72, 538,896,750.84 and 214,285,381.44 is: 295,718,342.90
Step by Step Solution
- Step 1: Write the proportion equation
390,498,927.72 : 538,896,750.84 = 214,285,381.44 : x - Step 2: Convert to fraction form
390,498,927.72/538,896,750.84 = 214,285,381.44/x - Step 3: Cross multiply
390,498,927.72x = 538,896,750.84 × 214,285,381.44 - Step 4: Simplify right side
390,498,927.72x = 115,477,695,810,526,048 - Step 5: Solve for x
x = 115,477,695,810,526,048/390,498,927.72 - Step 6: Final answer
x = 295,718,342.90
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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.