Finding the Fourth Proportional to 390,962.90, 586,455.30 and 138,207.68
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Solution
The fourth proportional to 390,962.90, 586,455.30 and 138,207.68 is: 207,315.39
Step by Step Solution
- Step 1: Write the proportion equation
390,962.90 : 586,455.30 = 138,207.68 : x - Step 2: Convert to fraction form
390,962.90/586,455.30 = 138,207.68/x - Step 3: Cross multiply
390,962.90x = 586,455.30 × 138,207.68 - Step 4: Simplify right side
390,962.90x = 81,052,626,436.70 - Step 5: Solve for x
x = 81,052,626,436.70/390,962.90 - Step 6: Final answer
x = 207,315.39
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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.