Finding the Fourth Proportional to 318,789.98, 478,295.69 and 141,421.55
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Solution
The fourth proportional to 318,789.98, 478,295.69 and 141,421.55 is: 212,181.43
Step by Step Solution
- Step 1: Write the proportion equation
318,789.98 : 478,295.69 = 141,421.55 : x - Step 2: Convert to fraction form
318,789.98/478,295.69 = 141,421.55/x - Step 3: Cross multiply
318,789.98x = 478,295.69 × 141,421.55 - Step 4: Simplify right side
318,789.98x = 67,641,314,739.53 - Step 5: Solve for x
x = 67,641,314,739.53/318,789.98 - Step 6: Final answer
x = 212,181.43
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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.