Finding the Fourth Proportional to 280,427.25, 386,987.60 and 153,102.84
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Solution
The fourth proportional to 280,427.25, 386,987.60 and 153,102.84 is: 211,280.82
Step by Step Solution
- Step 1: Write the proportion equation
280,427.25 : 386,987.60 = 153,102.84 : x - Step 2: Convert to fraction form
280,427.25/386,987.60 = 153,102.84/x - Step 3: Cross multiply
280,427.25x = 386,987.60 × 153,102.84 - Step 4: Simplify right side
280,427.25x = 59,248,900,604.78 - Step 5: Solve for x
x = 59,248,900,604.78/280,427.25 - Step 6: Final answer
x = 211,280.82
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1.5x scale
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.