Finding the Fourth Proportional to 665,681.12, 918,533.76 and 379,206.80
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Solution
The fourth proportional to 665,681.12, 918,533.76 and 379,206.80 is: 523,244.90
Step by Step Solution
- Step 1: Write the proportion equation
665,681.12 : 918,533.76 = 379,206.80 : x - Step 2: Convert to fraction form
665,681.12/918,533.76 = 379,206.80/x - Step 3: Cross multiply
665,681.12x = 918,533.76 × 379,206.80 - Step 4: Simplify right side
665,681.12x = 348,314,247,821.57 - Step 5: Solve for x
x = 348,314,247,821.57/665,681.12 - Step 6: Final answer
x = 523,244.90
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.