Finding the Fourth Proportional to 430.70, 646.08 and 122.55
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Solution
The fourth proportional to 430.70, 646.08 and 122.55 is: 183.83
Step by Step Solution
- Step 1: Write the proportion equation
430.70 : 646.08 = 122.55 : x - Step 2: Convert to fraction form
430.70/646.08 = 122.55/x - Step 3: Cross multiply
430.70x = 646.08 × 122.55 - Step 4: Simplify right side
430.70x = 79,177.10 - Step 5: Solve for x
x = 79,177.10/430.70 - Step 6: Final answer
x = 183.83
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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.