Finding the Fourth Proportional to 393,382,215.42, 542,853,237.28 and 217,166,434.55
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Solution
The fourth proportional to 393,382,215.42, 542,853,237.28 and 217,166,434.55 is: 299,681,829.54
Step by Step Solution
- Step 1: Write the proportion equation
393,382,215.42 : 542,853,237.28 = 217,166,434.55 : x - Step 2: Convert to fraction form
393,382,215.42/542,853,237.28 = 217,166,434.55/x - Step 3: Cross multiply
393,382,215.42x = 542,853,237.28 × 217,166,434.55 - Step 4: Simplify right side
393,382,215.42x = 117,889,502,024,022,736 - Step 5: Solve for x
x = 117,889,502,024,022,736/393,382,215.42 - Step 6: Final answer
x = 299,681,829.54
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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.