Finding the Fourth Proportional to 390,865.14, 539,388.74 and 221,099.27
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Solution
The fourth proportional to 390,865.14, 539,388.74 and 221,099.27 is: 305,114.07
Step by Step Solution
- Step 1: Write the proportion equation
390,865.14 : 539,388.74 = 221,099.27 : x - Step 2: Convert to fraction form
390,865.14/539,388.74 = 221,099.27/x - Step 3: Cross multiply
390,865.14x = 539,388.74 × 221,099.27 - Step 4: Simplify right side
390,865.14x = 119,258,454,516.02 - Step 5: Solve for x
x = 119,258,454,516.02/390,865.14 - Step 6: Final answer
x = 305,114.07
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.