Finding the Fourth Proportional to 1,188,416.80, 1,639,959.78 and 729,438.40
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Solution
The fourth proportional to 1,188,416.80, 1,639,959.78 and 729,438.40 is: 1,006,590.99
Step by Step Solution
- Step 1: Write the proportion equation
1,188,416.80 : 1,639,959.78 = 729,438.40 : x - Step 2: Convert to fraction form
1,188,416.80/1,639,959.78 = 729,438.40/x - Step 3: Cross multiply
1,188,416.80x = 1,639,959.78 × 729,438.40 - Step 4: Simplify right side
1,188,416.80x = 1,196,249,637,987.55 - Step 5: Solve for x
x = 1,196,249,637,987.55/1,188,416.80 - Step 6: Final answer
x = 1,006,590.99
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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.