Finding the Fourth Proportional to 1,098,209.40, 1,515,484.71 and 639,337.14
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Solution
The fourth proportional to 1,098,209.40, 1,515,484.71 and 639,337.14 is: 882,259.49
Step by Step Solution
- Step 1: Write the proportion equation
1,098,209.40 : 1,515,484.71 = 639,337.14 : x - Step 2: Convert to fraction form
1,098,209.40/1,515,484.71 = 639,337.14/x - Step 3: Cross multiply
1,098,209.40x = 1,515,484.71 × 639,337.14 - Step 4: Simplify right side
1,098,209.40x = 968,905,660,205.13 - Step 5: Solve for x
x = 968,905,660,205.13/1,098,209.40 - Step 6: Final answer
x = 882,259.49
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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.