Finding the Fourth Proportional to 516,135.60, 774,203.40 and 421,657.20
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Solution
The fourth proportional to 516,135.60, 774,203.40 and 421,657.20 is: 632,485.80
Step by Step Solution
- Step 1: Write the proportion equation
516,135.60 : 774,203.40 = 421,657.20 : x - Step 2: Convert to fraction form
516,135.60/774,203.40 = 421,657.20/x - Step 3: Cross multiply
516,135.60x = 774,203.40 × 421,657.20 - Step 4: Simplify right side
516,135.60x = 326,448,437,874.48 - Step 5: Solve for x
x = 326,448,437,874.48/516,135.60 - Step 6: Final answer
x = 632,485.80
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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.