Finding the Fourth Proportional to 863,138,972.10, 1,294,708,458.15 and 791,713,301.70
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Solution
The fourth proportional to 863,138,972.10, 1,294,708,458.15 and 791,713,301.70 is: 1,187,569,952.55
Step by Step Solution
- Step 1: Write the proportion equation
863,138,972.10 : 1,294,708,458.15 = 791,713,301.70 : x - Step 2: Convert to fraction form
863,138,972.10/1,294,708,458.15 = 791,713,301.70/x - Step 3: Cross multiply
863,138,972.10x = 1,294,708,458.15 × 791,713,301.70 - Step 4: Simplify right side
863,138,972.10x = 1,025,037,908,140,852,864 - Step 5: Solve for x
x = 1,025,037,908,140,852,864/863,138,972.10 - Step 6: Final answer
x = 1,187,569,952.55
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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.