Finding the Fourth Proportional to 487,454,149.20, 672,686,725.91 and 278,614,775.93
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Solution
The fourth proportional to 487,454,149.20, 672,686,725.91 and 278,614,775.93 is: 384,488,390.80
Step by Step Solution
- Step 1: Write the proportion equation
487,454,149.20 : 672,686,725.91 = 278,614,775.93 : x - Step 2: Convert to fraction form
487,454,149.20/672,686,725.91 = 278,614,775.93/x - Step 3: Cross multiply
487,454,149.20x = 672,686,725.91 × 278,614,775.93 - Step 4: Simplify right side
487,454,149.20x = 187,420,461,412,878,240 - Step 5: Solve for x
x = 187,420,461,412,878,240/487,454,149.20 - Step 6: Final answer
x = 384,488,390.80
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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.