Finding the Fourth Proportional to 390,317.12, 538,637.52 and 211,469.12
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Solution
The fourth proportional to 390,317.12, 538,637.52 and 211,469.12 is: 291,827.33
Step by Step Solution
- Step 1: Write the proportion equation
390,317.12 : 538,637.52 = 211,469.12 : x - Step 2: Convert to fraction form
390,317.12/538,637.52 = 211,469.12/x - Step 3: Cross multiply
390,317.12x = 538,637.52 × 211,469.12 - Step 4: Simplify right side
390,317.12x = 113,905,202,353.38 - Step 5: Solve for x
x = 113,905,202,353.38/390,317.12 - Step 6: Final answer
x = 291,827.33
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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.