Finding the Fourth Proportional to 354.36, 489 and 207
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Solution
The fourth proportional to 354.36, 489 and 207 is: 285.65
Step by Step Solution
- Step 1: Write the proportion equation
354.36 : 489 = 207 : x - Step 2: Convert to fraction form
354.36/489 = 207/x - Step 3: Cross multiply
354.36x = 489 × 207 - Step 4: Simplify right side
354.36x = 101,223 - Step 5: Solve for x
x = 101,223/354.36 - Step 6: Final answer
x = 285.65
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.