Finding the Fourth Proportional to 687,447.60, 1,031,248.20 and 214,129.20
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Solution
The fourth proportional to 687,447.60, 1,031,248.20 and 214,129.20 is: 321,217.72
Step by Step Solution
- Step 1: Write the proportion equation
687,447.60 : 1,031,248.20 = 214,129.20 : x - Step 2: Convert to fraction form
687,447.60/1,031,248.20 = 214,129.20/x - Step 3: Cross multiply
687,447.60x = 1,031,248.20 × 214,129.20 - Step 4: Simplify right side
687,447.60x = 220,820,352,067.44 - Step 5: Solve for x
x = 220,820,352,067.44/687,447.60 - Step 6: Final answer
x = 321,217.72
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.