Finding the Fourth Proportional to 398,445.74, 549,841.05 and 217,154.07
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Solution
The fourth proportional to 398,445.74, 549,841.05 and 217,154.07 is: 299,664.95
Step by Step Solution
- Step 1: Write the proportion equation
398,445.74 : 549,841.05 = 217,154.07 : x - Step 2: Convert to fraction form
398,445.74/549,841.05 = 217,154.07/x - Step 3: Cross multiply
398,445.74x = 549,841.05 × 217,154.07 - Step 4: Simplify right side
398,445.74x = 119,400,221,860.57 - Step 5: Solve for x
x = 119,400,221,860.57/398,445.74 - Step 6: Final answer
x = 299,664.95
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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.