Finding the Fourth Proportional to 1,247,802,335.81, 1,722,021,031.61 and 690,885,432.08
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Solution
The fourth proportional to 1,247,802,335.81, 1,722,021,031.61 and 690,885,432.08 is: 953,451,688.89
Step by Step Solution
- Step 1: Write the proportion equation
1,247,802,335.81 : 1,722,021,031.61 = 690,885,432.08 : x - Step 2: Convert to fraction form
1,247,802,335.81/1,722,021,031.61 = 690,885,432.08/x - Step 3: Cross multiply
1,247,802,335.81x = 1,722,021,031.61 × 690,885,432.08 - Step 4: Simplify right side
1,247,802,335.81x = 1,189,719,244,474,722,304 - Step 5: Solve for x
x = 1,189,719,244,474,722,304/1,247,802,335.81 - Step 6: Final answer
x = 953,451,688.89
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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.