Finding the Fourth Proportional to 1,390,640.25, 2,086,283.87 and 431,044.95
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Solution
The fourth proportional to 1,390,640.25, 2,086,283.87 and 431,044.95 is: 646,667.70
Step by Step Solution
- Step 1: Write the proportion equation
1,390,640.25 : 2,086,283.87 = 431,044.95 : x - Step 2: Convert to fraction form
1,390,640.25/2,086,283.87 = 431,044.95/x - Step 3: Cross multiply
1,390,640.25x = 2,086,283.87 × 431,044.95 - Step 4: Simplify right side
1,390,640.25x = 899,282,126,429.96 - Step 5: Solve for x
x = 899,282,126,429.96/1,390,640.25 - Step 6: Final answer
x = 646,667.70
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.