Finding the Fourth Proportional to 987,143.99, 1,480,421.70 and 418,515.95
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Solution
The fourth proportional to 987,143.99, 1,480,421.70 and 418,515.95 is: 627,649.15
Step by Step Solution
- Step 1: Write the proportion equation
987,143.99 : 1,480,421.70 = 418,515.95 : x - Step 2: Convert to fraction form
987,143.99/1,480,421.70 = 418,515.95/x - Step 3: Cross multiply
987,143.99x = 1,480,421.70 × 418,515.95 - Step 4: Simplify right side
987,143.99x = 619,580,086,774.01 - Step 5: Solve for x
x = 619,580,086,774.01/987,143.99 - Step 6: Final answer
x = 627,649.15
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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.