Finding the Fourth Proportional to 395,293,434.98, 545,186,863.42 and 347,506,513.82
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Solution
The fourth proportional to 395,293,434.98, 545,186,863.42 and 347,506,513.82 is: 479,279,364.45
Step by Step Solution
- Step 1: Write the proportion equation
395,293,434.98 : 545,186,863.42 = 347,506,513.82 : x - Step 2: Convert to fraction form
395,293,434.98/545,186,863.42 = 347,506,513.82/x - Step 3: Cross multiply
395,293,434.98x = 545,186,863.42 × 347,506,513.82 - Step 4: Simplify right side
395,293,434.98x = 189,455,986,287,544,672 - Step 5: Solve for x
x = 189,455,986,287,544,672/395,293,434.98 - Step 6: Final answer
x = 479,279,364.45
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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.