Finding the Fourth Proportional to 391,212.48, 539,886.08 and 221,442.96
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Solution
The fourth proportional to 391,212.48, 539,886.08 and 221,442.96 is: 305,598.56
Step by Step Solution
- Step 1: Write the proportion equation
391,212.48 : 539,886.08 = 221,442.96 : x - Step 2: Convert to fraction form
391,212.48/539,886.08 = 221,442.96/x - Step 3: Cross multiply
391,212.48x = 539,886.08 × 221,442.96 - Step 4: Simplify right side
391,212.48x = 119,553,971,618.00 - Step 5: Solve for x
x = 119,553,971,618.00/391,212.48 - Step 6: Final answer
x = 305,598.56
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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.