Finding the Fourth Proportional to 1,259,865,126.20, 1,889,797,689.30 and 493,960,230.20
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Solution
The fourth proportional to 1,259,865,126.20, 1,889,797,689.30 and 493,960,230.20 is: 740,940,345.30
Step by Step Solution
- Step 1: Write the proportion equation
1,259,865,126.20 : 1,889,797,689.30 = 493,960,230.20 : x - Step 2: Convert to fraction form
1,259,865,126.20/1,889,797,689.30 = 493,960,230.20/x - Step 3: Cross multiply
1,259,865,126.20x = 1,889,797,689.30 × 493,960,230.20 - Step 4: Simplify right side
1,259,865,126.20x = 933,484,901,638,056,064 - Step 5: Solve for x
x = 933,484,901,638,056,064/1,259,865,126.20 - Step 6: Final answer
x = 740,940,345.30
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Double scale
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Similar ratio
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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.