Finding the Fourth Proportional to 1,918,439.12, 2,877,330.36 and 638,901.20
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Solution
The fourth proportional to 1,918,439.12, 2,877,330.36 and 638,901.20 is: 958,242.46
Step by Step Solution
- Step 1: Write the proportion equation
1,918,439.12 : 2,877,330.36 = 638,901.20 : x - Step 2: Convert to fraction form
1,918,439.12/2,877,330.36 = 638,901.20/x - Step 3: Cross multiply
1,918,439.12x = 2,877,330.36 × 638,901.20 - Step 4: Simplify right side
1,918,439.12x = 1,838,329,819,800.43 - Step 5: Solve for x
x = 1,838,329,819,800.43/1,918,439.12 - Step 6: Final answer
x = 958,242.46
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1.5x scale
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.