Finding the Fourth Proportional to 1,188,420,485.60, 1,639,988,360.24 and 712,379,811.44
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Solution
The fourth proportional to 1,188,420,485.60, 1,639,988,360.24 and 712,379,811.44 is: 983,065,011.91
Step by Step Solution
- Step 1: Write the proportion equation
1,188,420,485.60 : 1,639,988,360.24 = 712,379,811.44 : x - Step 2: Convert to fraction form
1,188,420,485.60/1,639,988,360.24 = 712,379,811.44/x - Step 3: Cross multiply
1,188,420,485.60x = 1,639,988,360.24 × 712,379,811.44 - Step 4: Simplify right side
1,188,420,485.60x = 1,168,294,598,831,566,080 - Step 5: Solve for x
x = 1,168,294,598,831,566,080/1,188,420,485.60 - Step 6: Final answer
x = 983,065,011.91
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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.