Finding the Fourth Proportional to 1,231,990.74, 1,700,129.18 and 688,134.40
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Solution
The fourth proportional to 1,231,990.74, 1,700,129.18 and 688,134.40 is: 949,615.40
Step by Step Solution
- Step 1: Write the proportion equation
1,231,990.74 : 1,700,129.18 = 688,134.40 : x - Step 2: Convert to fraction form
1,231,990.74/1,700,129.18 = 688,134.40/x - Step 3: Cross multiply
1,231,990.74x = 1,700,129.18 × 688,134.40 - Step 4: Simplify right side
1,231,990.74x = 1,169,917,373,201.79 - Step 5: Solve for x
x = 1,169,917,373,201.79/1,231,990.74 - Step 6: Final answer
x = 949,615.40
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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.