Finding the Fourth Proportional to 865,638.70, 1,298,458.05 and 492,390.70
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Solution
The fourth proportional to 865,638.70, 1,298,458.05 and 492,390.70 is: 738,586.05
Step by Step Solution
- Step 1: Write the proportion equation
865,638.70 : 1,298,458.05 = 492,390.70 : x - Step 2: Convert to fraction form
865,638.70/1,298,458.05 = 492,390.70/x - Step 3: Cross multiply
865,638.70x = 1,298,458.05 × 492,390.70 - Step 4: Simplify right side
865,638.70x = 639,348,668,160.14 - Step 5: Solve for x
x = 639,348,668,160.14/865,638.70 - Step 6: Final answer
x = 738,586.05
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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.