Finding the Fourth Proportional to 398,427.14, 549,813.41 and 217,135.17
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Solution
The fourth proportional to 398,427.14, 549,813.41 and 217,135.17 is: 299,637.79
Step by Step Solution
- Step 1: Write the proportion equation
398,427.14 : 549,813.41 = 217,135.17 : x - Step 2: Convert to fraction form
398,427.14/549,813.41 = 217,135.17/x - Step 3: Cross multiply
398,427.14x = 549,813.41 × 217,135.17 - Step 4: Simplify right side
398,427.14x = 119,383,828,248.63 - Step 5: Solve for x
x = 119,383,828,248.63/398,427.14 - Step 6: Final answer
x = 299,637.79
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1.5x scale
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.