Finding the Fourth Proportional to 390,831,217.74, 586,265,679.93 and 128,509,960.91
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Solution
The fourth proportional to 390,831,217.74, 586,265,679.93 and 128,509,960.91 is: 192,771,140.55
Step by Step Solution
- Step 1: Write the proportion equation
390,831,217.74 : 586,265,679.93 = 128,509,960.91 : x - Step 2: Convert to fraction form
390,831,217.74/586,265,679.93 = 128,509,960.91/x - Step 3: Cross multiply
390,831,217.74x = 586,265,679.93 × 128,509,960.91 - Step 4: Simplify right side
390,831,217.74x = 75,340,979,607,747,536 - Step 5: Solve for x
x = 75,340,979,607,747,536/390,831,217.74 - Step 6: Final answer
x = 192,771,140.55
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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.