Finding the Fourth Proportional to 858,448,987.20, 1,287,767,959.20 and 276,084,129.60
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Solution
The fourth proportional to 858,448,987.20, 1,287,767,959.20 and 276,084,129.60 is: 414,156,579.42
Step by Step Solution
- Step 1: Write the proportion equation
858,448,987.20 : 1,287,767,959.20 = 276,084,129.60 : x - Step 2: Convert to fraction form
858,448,987.20/1,287,767,959.20 = 276,084,129.60/x - Step 3: Cross multiply
858,448,987.20x = 1,287,767,959.20 × 276,084,129.60 - Step 4: Simplify right side
858,448,987.20x = 355,532,296,142,500,352 - Step 5: Solve for x
x = 355,532,296,142,500,352/858,448,987.20 - Step 6: Final answer
x = 414,156,579.42
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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.