Finding the Fourth Proportional to 420,021.18, 630,034.05 and 104,478.09
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Solution
The fourth proportional to 420,021.18, 630,034.05 and 104,478.09 is: 156,717.70
Step by Step Solution
- Step 1: Write the proportion equation
420,021.18 : 630,034.05 = 104,478.09 : x - Step 2: Convert to fraction form
420,021.18/630,034.05 = 104,478.09/x - Step 3: Cross multiply
420,021.18x = 630,034.05 × 104,478.09 - Step 4: Simplify right side
420,021.18x = 65,824,754,178.96 - Step 5: Solve for x
x = 65,824,754,178.96/420,021.18 - Step 6: Final answer
x = 156,717.70
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1.5x scale
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.