Finding the Fourth Proportional to 390,133.08, 538,235.28 and 288,402.80
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Solution
The fourth proportional to 390,133.08, 538,235.28 and 288,402.80 is: 397,886.18
Step by Step Solution
- Step 1: Write the proportion equation
390,133.08 : 538,235.28 = 288,402.80 : x - Step 2: Convert to fraction form
390,133.08/538,235.28 = 288,402.80/x - Step 3: Cross multiply
390,133.08x = 538,235.28 × 288,402.80 - Step 4: Simplify right side
390,133.08x = 155,228,561,810.78 - Step 5: Solve for x
x = 155,228,561,810.78/390,133.08 - Step 6: Final answer
x = 397,886.18
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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.