Finding the Fourth Proportional to 641,964.25, 885,899.76 and 355,478.18
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Solution
The fourth proportional to 641,964.25, 885,899.76 and 355,478.18 is: 490,553.85
Step by Step Solution
- Step 1: Write the proportion equation
641,964.25 : 885,899.76 = 355,478.18 : x - Step 2: Convert to fraction form
641,964.25/885,899.76 = 355,478.18/x - Step 3: Cross multiply
641,964.25x = 885,899.76 × 355,478.18 - Step 4: Simplify right side
641,964.25x = 314,918,034,347.24 - Step 5: Solve for x
x = 314,918,034,347.24/641,964.25 - Step 6: Final answer
x = 490,553.85
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1.5x scale
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.