Finding the Fourth Proportional to 430.68, 646.20 and 286.68
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Solution
The fourth proportional to 430.68, 646.20 and 286.68 is: 430.14
Step by Step Solution
- Step 1: Write the proportion equation
430.68 : 646.20 = 286.68 : x - Step 2: Convert to fraction form
430.68/646.20 = 286.68/x - Step 3: Cross multiply
430.68x = 646.20 × 286.68 - Step 4: Simplify right side
430.68x = 185,252.62 - Step 5: Solve for x
x = 185,252.62/430.68 - Step 6: Final answer
x = 430.14
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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.