Finding the Fourth Proportional to 430.11, 643.62 and 372.53
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Solution
The fourth proportional to 430.11, 643.62 and 372.53 is: 557.46
Step by Step Solution
- Step 1: Write the proportion equation
430.11 : 643.62 = 372.53 : x - Step 2: Convert to fraction form
430.11/643.62 = 372.53/x - Step 3: Cross multiply
430.11x = 643.62 × 372.53 - Step 4: Simplify right side
430.11x = 239,769.37 - Step 5: Solve for x
x = 239,769.37/430.11 - Step 6: Final answer
x = 557.46
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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.