Finding the Fourth Proportional to 640,872.40, 960,271.80 and 403,790.80
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Solution
The fourth proportional to 640,872.40, 960,271.80 and 403,790.80 is: 605,032.95
Step by Step Solution
- Step 1: Write the proportion equation
640,872.40 : 960,271.80 = 403,790.80 : x - Step 2: Convert to fraction form
640,872.40/960,271.80 = 403,790.80/x - Step 3: Cross multiply
640,872.40x = 960,271.80 × 403,790.80 - Step 4: Simplify right side
640,872.40x = 387,748,918,339.44 - Step 5: Solve for x
x = 387,748,918,339.44/640,872.40 - Step 6: Final answer
x = 605,032.95
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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.