Finding the Fourth Proportional to 1,426,437.12, 2,138,385.74 and 515,416.40
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Solution
The fourth proportional to 1,426,437.12, 2,138,385.74 and 515,416.40 is: 772,665.72
Step by Step Solution
- Step 1: Write the proportion equation
1,426,437.12 : 2,138,385.74 = 515,416.40 : x - Step 2: Convert to fraction form
1,426,437.12/2,138,385.74 = 515,416.40/x - Step 3: Cross multiply
1,426,437.12x = 2,138,385.74 × 515,416.40 - Step 4: Simplify right side
1,426,437.12x = 1,102,159,066,653.13 - Step 5: Solve for x
x = 1,102,159,066,653.13/1,426,437.12 - Step 6: Final answer
x = 772,665.72
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.