Finding the Fourth Proportional to 1,390,928.18, 2,086,691.87 and 431,364.42
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Solution
The fourth proportional to 1,390,928.18, 2,086,691.87 and 431,364.42 is: 647,139.54
Step by Step Solution
- Step 1: Write the proportion equation
1,390,928.18 : 2,086,691.87 = 431,364.42 : x - Step 2: Convert to fraction form
1,390,928.18/2,086,691.87 = 431,364.42/x - Step 3: Cross multiply
1,390,928.18x = 2,086,691.87 × 431,364.42 - Step 4: Simplify right side
1,390,928.18x = 900,124,617,787.81 - Step 5: Solve for x
x = 900,124,617,787.81/1,390,928.18 - Step 6: Final answer
x = 647,139.54
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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.