Finding the Fourth Proportional to 280,358.18, 386,879.64 and 153,009.08
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Solution
The fourth proportional to 280,358.18, 386,879.64 and 153,009.08 is: 211,144.54
Step by Step Solution
- Step 1: Write the proportion equation
280,358.18 : 386,879.64 = 153,009.08 : x - Step 2: Convert to fraction form
280,358.18/386,879.64 = 153,009.08/x - Step 3: Cross multiply
280,358.18x = 386,879.64 × 153,009.08 - Step 4: Simplify right side
280,358.18x = 59,196,097,787.13 - Step 5: Solve for x
x = 59,196,097,787.13/280,358.18 - Step 6: Final answer
x = 211,144.54
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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.