Finding the Fourth Proportional to 390,679.58, 586,201.68 and 138,151.32
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Solution
The fourth proportional to 390,679.58, 586,201.68 and 138,151.32 is: 207,291.45
Step by Step Solution
- Step 1: Write the proportion equation
390,679.58 : 586,201.68 = 138,151.32 : x - Step 2: Convert to fraction form
390,679.58/586,201.68 = 138,151.32/x - Step 3: Cross multiply
390,679.58x = 586,201.68 × 138,151.32 - Step 4: Simplify right side
390,679.58x = 80,984,535,878.22 - Step 5: Solve for x
x = 80,984,535,878.22/390,679.58 - Step 6: Final answer
x = 207,291.45
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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.