Finding the Fourth Proportional to 398,531.12, 549,968.47 and 217,239.08
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Solution
The fourth proportional to 398,531.12, 549,968.47 and 217,239.08 is: 299,787.49
Step by Step Solution
- Step 1: Write the proportion equation
398,531.12 : 549,968.47 = 217,239.08 : x - Step 2: Convert to fraction form
398,531.12/549,968.47 = 217,239.08/x - Step 3: Cross multiply
398,531.12x = 549,968.47 × 217,239.08 - Step 4: Simplify right side
398,531.12x = 119,474,641,158.87 - Step 5: Solve for x
x = 119,474,641,158.87/398,531.12 - Step 6: Final answer
x = 299,787.49
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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.