Finding the Fourth Proportional to 390,973.97, 539,383.70 and 237,889.44
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Solution
The fourth proportional to 390,973.97, 539,383.70 and 237,889.44 is: 328,189.85
Step by Step Solution
- Step 1: Write the proportion equation
390,973.97 : 539,383.70 = 237,889.44 : x - Step 2: Convert to fraction form
390,973.97/539,383.70 = 237,889.44/x - Step 3: Cross multiply
390,973.97x = 539,383.70 × 237,889.44 - Step 4: Simplify right side
390,973.97x = 128,313,685,148.68 - Step 5: Solve for x
x = 128,313,685,148.68/390,973.97 - Step 6: Final answer
x = 328,189.85
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1.5x scale
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.