Finding the Fourth Proportional to 408,871.80, 613,307.70 and 209,125.80
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Solution
The fourth proportional to 408,871.80, 613,307.70 and 209,125.80 is: 313,688.70
Step by Step Solution
- Step 1: Write the proportion equation
408,871.80 : 613,307.70 = 209,125.80 : x - Step 2: Convert to fraction form
408,871.80/613,307.70 = 209,125.80/x - Step 3: Cross multiply
408,871.80x = 613,307.70 × 209,125.80 - Step 4: Simplify right side
408,871.80x = 128,258,463,408.66 - Step 5: Solve for x
x = 128,258,463,408.66/408,871.80 - Step 6: Final answer
x = 313,688.70
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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.