Finding the Fourth Proportional to 398,434.12, 549,812.35 and 226,388.30
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Solution
The fourth proportional to 398,434.12, 549,812.35 and 226,388.30 is: 312,400.66
Step by Step Solution
- Step 1: Write the proportion equation
398,434.12 : 549,812.35 = 226,388.30 : x - Step 2: Convert to fraction form
398,434.12/549,812.35 = 226,388.30/x - Step 3: Cross multiply
398,434.12x = 549,812.35 × 226,388.30 - Step 4: Simplify right side
398,434.12x = 124,471,083,235.51 - Step 5: Solve for x
x = 124,471,083,235.51/398,434.12 - Step 6: Final answer
x = 312,400.66
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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.