Finding the Fourth Proportional to 390,831,219.88, 586,265,683.12 and 128,509,963.04
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Solution
The fourth proportional to 390,831,219.88, 586,265,683.12 and 128,509,963.04 is: 192,771,143.75
Step by Step Solution
- Step 1: Write the proportion equation
390,831,219.88 : 586,265,683.12 = 128,509,963.04 : x - Step 2: Convert to fraction form
390,831,219.88/586,265,683.12 = 128,509,963.04/x - Step 3: Cross multiply
390,831,219.88x = 586,265,683.12 × 128,509,963.04 - Step 4: Simplify right side
390,831,219.88x = 75,340,981,269,371,552 - Step 5: Solve for x
x = 75,340,981,269,371,552/390,831,219.88 - Step 6: Final answer
x = 192,771,143.75
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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.