Finding the Fourth Proportional to 390,278.21, 538,588.10 and 229,135.19
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Solution
The fourth proportional to 390,278.21, 538,588.10 and 229,135.19 is: 316,209.01
Step by Step Solution
- Step 1: Write the proportion equation
390,278.21 : 538,588.10 = 229,135.19 : x - Step 2: Convert to fraction form
390,278.21/538,588.10 = 229,135.19/x - Step 3: Cross multiply
390,278.21x = 538,588.10 × 229,135.19 - Step 4: Simplify right side
390,278.21x = 123,409,484,505.14 - Step 5: Solve for x
x = 123,409,484,505.14/390,278.21 - Step 6: Final answer
x = 316,209.01
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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.