Finding the Fourth Proportional to 390,108.69, 585,188.53 and 120,203.73
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Solution
The fourth proportional to 390,108.69, 585,188.53 and 120,203.73 is: 180,313.45
Step by Step Solution
- Step 1: Write the proportion equation
390,108.69 : 585,188.53 = 120,203.73 : x - Step 2: Convert to fraction form
390,108.69/585,188.53 = 120,203.73/x - Step 3: Cross multiply
390,108.69x = 585,188.53 × 120,203.73 - Step 4: Simplify right side
390,108.69x = 70,341,843,758.71 - Step 5: Solve for x
x = 70,341,843,758.71/390,108.69 - Step 6: Final answer
x = 180,313.45
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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.