Finding the Fourth Proportional to 921,143.19, 1,271,186.14 and 507,694.70
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Solution
The fourth proportional to 921,143.19, 1,271,186.14 and 507,694.70 is: 700,623.40
Step by Step Solution
- Step 1: Write the proportion equation
921,143.19 : 1,271,186.14 = 507,694.70 : x - Step 2: Convert to fraction form
921,143.19/1,271,186.14 = 507,694.70/x - Step 3: Cross multiply
921,143.19x = 1,271,186.14 × 507,694.70 - Step 4: Simplify right side
921,143.19x = 645,374,468,852.11 - Step 5: Solve for x
x = 645,374,468,852.11/921,143.19 - Step 6: Final answer
x = 700,623.40
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.