Finding the Fourth Proportional to 641,304,043.80, 961,956,065.70 and 278,506,987.80
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Solution
The fourth proportional to 641,304,043.80, 961,956,065.70 and 278,506,987.80 is: 417,760,481.70
Step by Step Solution
- Step 1: Write the proportion equation
641,304,043.80 : 961,956,065.70 = 278,506,987.80 : x - Step 2: Convert to fraction form
641,304,043.80/961,956,065.70 = 278,506,987.80/x - Step 3: Cross multiply
641,304,043.80x = 961,956,065.70 × 278,506,987.80 - Step 4: Simplify right side
641,304,043.80x = 267,911,486,254,045,920 - Step 5: Solve for x
x = 267,911,486,254,045,920/641,304,043.80 - Step 6: Final answer
x = 417,760,481.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.