Finding the Fourth Proportional to 863,138,979.60, 1,294,708,469.40 and 791,713,309.20
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Solution
The fourth proportional to 863,138,979.60, 1,294,708,469.40 and 791,713,309.20 is: 1,187,569,963.80
Step by Step Solution
- Step 1: Write the proportion equation
863,138,979.60 : 1,294,708,469.40 = 791,713,309.20 : x - Step 2: Convert to fraction form
863,138,979.60/1,294,708,469.40 = 791,713,309.20/x - Step 3: Cross multiply
863,138,979.60x = 1,294,708,469.40 × 791,713,309.20 - Step 4: Simplify right side
863,138,979.60x = 1,025,037,926,757,941,120 - Step 5: Solve for x
x = 1,025,037,926,757,941,120/863,138,979.60 - Step 6: Final answer
x = 1,187,569,963.80
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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.