Finding the Fourth Proportional to 428,765.28, 643,153.36 and 162,454.26
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Solution
The fourth proportional to 428,765.28, 643,153.36 and 162,454.26 is: 243,683.45
Step by Step Solution
- Step 1: Write the proportion equation
428,765.28 : 643,153.36 = 162,454.26 : x - Step 2: Convert to fraction form
428,765.28/643,153.36 = 162,454.26/x - Step 3: Cross multiply
428,765.28x = 643,153.36 × 162,454.26 - Step 4: Simplify right side
428,765.28x = 104,483,003,165.31 - Step 5: Solve for x
x = 104,483,003,165.31/428,765.28 - Step 6: Final answer
x = 243,683.45
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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.