Finding the Fourth Proportional to 390,831,118.34, 586,265,532.24 and 128,509,861.68
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Solution
The fourth proportional to 390,831,118.34, 586,265,532.24 and 128,509,861.68 is: 192,770,992.17
Step by Step Solution
- Step 1: Write the proportion equation
390,831,118.34 : 586,265,532.24 = 128,509,861.68 : x - Step 2: Convert to fraction form
390,831,118.34/586,265,532.24 = 128,509,861.68/x - Step 3: Cross multiply
390,831,118.34x = 586,265,532.24 × 128,509,861.68 - Step 4: Simplify right side
390,831,118.34x = 75,340,902,452,982,656 - Step 5: Solve for x
x = 75,340,902,452,982,656/390,831,118.34 - Step 6: Final answer
x = 192,770,992.17
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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.