Finding the Fourth Proportional to 390,207.36, 585,366.78 and 120,358.20
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Solution
The fourth proportional to 390,207.36, 585,366.78 and 120,358.20 is: 180,554.49
Step by Step Solution
- Step 1: Write the proportion equation
390,207.36 : 585,366.78 = 120,358.20 : x - Step 2: Convert to fraction form
390,207.36/585,366.78 = 120,358.20/x - Step 3: Cross multiply
390,207.36x = 585,366.78 × 120,358.20 - Step 4: Simplify right side
390,207.36x = 70,453,691,980.60 - Step 5: Solve for x
x = 70,453,691,980.60/390,207.36 - Step 6: Final answer
x = 180,554.49
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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.