Finding the Fourth Proportional to 490,752,135.60, 736,128,203.40 and 145,759,009.20
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Solution
The fourth proportional to 490,752,135.60, 736,128,203.40 and 145,759,009.20 is: 218,638,513.80
Step by Step Solution
- Step 1: Write the proportion equation
490,752,135.60 : 736,128,203.40 = 145,759,009.20 : x - Step 2: Convert to fraction form
490,752,135.60/736,128,203.40 = 145,759,009.20/x - Step 3: Cross multiply
490,752,135.60x = 736,128,203.40 × 145,759,009.20 - Step 4: Simplify right side
490,752,135.60x = 107,297,317,571,760,064 - Step 5: Solve for x
x = 107,297,317,571,760,064/490,752,135.60 - Step 6: Final answer
x = 218,638,513.80
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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.