Finding the Fourth Proportional to 1,216,355.12, 1,678,565.86 and 679,811.12
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Solution
The fourth proportional to 1,216,355.12, 1,678,565.86 and 679,811.12 is: 938,137.00
Step by Step Solution
- Step 1: Write the proportion equation
1,216,355.12 : 1,678,565.86 = 679,811.12 : x - Step 2: Convert to fraction form
1,216,355.12/1,678,565.86 = 679,811.12/x - Step 3: Cross multiply
1,216,355.12x = 1,678,565.86 × 679,811.12 - Step 4: Simplify right side
1,216,355.12x = 1,141,107,737,280.36 - Step 5: Solve for x
x = 1,141,107,737,280.36/1,216,355.12 - Step 6: Final answer
x = 938,137.00
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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.