Finding the Fourth Proportional to 368,678,530.12, 508,791,828.18 and 212,045,680.84
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Solution
The fourth proportional to 368,678,530.12, 508,791,828.18 and 212,045,680.84 is: 292,631,929.44
Step by Step Solution
- Step 1: Write the proportion equation
368,678,530.12 : 508,791,828.18 = 212,045,680.84 : x - Step 2: Convert to fraction form
368,678,530.12/508,791,828.18 = 212,045,680.84/x - Step 3: Cross multiply
368,678,530.12x = 508,791,828.18 × 212,045,680.84 - Step 4: Simplify right side
368,678,530.12x = 107,887,109,612,256,400 - Step 5: Solve for x
x = 107,887,109,612,256,400/368,678,530.12 - Step 6: Final answer
x = 292,631,929.44
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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.