Finding the Fourth Proportional to 420.68, 579.84 and 358.67
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Solution
The fourth proportional to 420.68, 579.84 and 358.67 is: 494.37
Step by Step Solution
- Step 1: Write the proportion equation
420.68 : 579.84 = 358.67 : x - Step 2: Convert to fraction form
420.68/579.84 = 358.67/x - Step 3: Cross multiply
420.68x = 579.84 × 358.67 - Step 4: Simplify right side
420.68x = 207,971.21 - Step 5: Solve for x
x = 207,971.21/420.68 - Step 6: Final answer
x = 494.37
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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.