Finding the Fourth Proportional to 858,390,937.20, 1,287,586,405.80 and 313,150,258.80
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Solution
The fourth proportional to 858,390,937.20, 1,287,586,405.80 and 313,150,258.80 is: 469,725,388.20
Step by Step Solution
- Step 1: Write the proportion equation
858,390,937.20 : 1,287,586,405.80 = 313,150,258.80 : x - Step 2: Convert to fraction form
858,390,937.20/1,287,586,405.80 = 313,150,258.80/x - Step 3: Cross multiply
858,390,937.20x = 1,287,586,405.80 × 313,150,258.80 - Step 4: Simplify right side
858,390,937.20x = 403,208,016,203,631,808 - Step 5: Solve for x
x = 403,208,016,203,631,808/858,390,937.20 - Step 6: Final answer
x = 469,725,388.20
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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.