Finding the Fourth Proportional to 763,423.60, 1,145,135.40 and 756,425.20
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Solution
The fourth proportional to 763,423.60, 1,145,135.40 and 756,425.20 is: 1,134,637.80
Step by Step Solution
- Step 1: Write the proportion equation
763,423.60 : 1,145,135.40 = 756,425.20 : x - Step 2: Convert to fraction form
763,423.60/1,145,135.40 = 756,425.20/x - Step 3: Cross multiply
763,423.60x = 1,145,135.40 × 756,425.20 - Step 4: Simplify right side
763,423.60x = 866,209,273,972.08 - Step 5: Solve for x
x = 866,209,273,972.08/763,423.60 - Step 6: Final answer
x = 1,134,637.80
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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.