Finding the Fourth Proportional to 391,129.75, 539,759.06 and 212,281.75
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Solution
The fourth proportional to 391,129.75, 539,759.06 and 212,281.75 is: 292,948.82
Step by Step Solution
- Step 1: Write the proportion equation
391,129.75 : 539,759.06 = 212,281.75 : x - Step 2: Convert to fraction form
391,129.75/539,759.06 = 212,281.75/x - Step 3: Cross multiply
391,129.75x = 539,759.06 × 212,281.75 - Step 4: Simplify right side
391,129.75x = 114,580,997,835.16 - Step 5: Solve for x
x = 114,580,997,835.16/391,129.75 - Step 6: Final answer
x = 292,948.82
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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.