Finding the Fourth Proportional to 2,128,311.18, 3,186,758.70 and 1,328,000.40
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Solution
The fourth proportional to 2,128,311.18, 3,186,758.70 and 1,328,000.40 is: 1,988,438.94
Step by Step Solution
- Step 1: Write the proportion equation
2,128,311.18 : 3,186,758.70 = 1,328,000.40 : x - Step 2: Convert to fraction form
2,128,311.18/3,186,758.70 = 1,328,000.40/x - Step 3: Cross multiply
2,128,311.18x = 3,186,758.70 × 1,328,000.40 - Step 4: Simplify right side
2,128,311.18x = 4,232,016,828,303.48 - Step 5: Solve for x
x = 4,232,016,828,303.48/2,128,311.18 - Step 6: Final answer
x = 1,988,438.94
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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.