Finding the Fourth Proportional to 318,937.20, 478,405.80 and 97,321.20
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Solution
The fourth proportional to 318,937.20, 478,405.80 and 97,321.20 is: 145,981.80
Step by Step Solution
- Step 1: Write the proportion equation
318,937.20 : 478,405.80 = 97,321.20 : x - Step 2: Convert to fraction form
318,937.20/478,405.80 = 97,321.20/x - Step 3: Cross multiply
318,937.20x = 478,405.80 × 97,321.20 - Step 4: Simplify right side
318,937.20x = 46,559,026,542.96 - Step 5: Solve for x
x = 46,559,026,542.96/318,937.20 - Step 6: Final answer
x = 145,981.80
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1.5x scale
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.