Finding the Fourth Proportional to 398,395.76, 549,772.18 and 217,103.99
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Solution
The fourth proportional to 398,395.76, 549,772.18 and 217,103.99 is: 299,595.89
Step by Step Solution
- Step 1: Write the proportion equation
398,395.76 : 549,772.18 = 217,103.99 : x - Step 2: Convert to fraction form
398,395.76/549,772.18 = 217,103.99/x - Step 3: Cross multiply
398,395.76x = 549,772.18 × 217,103.99 - Step 4: Simplify right side
398,395.76x = 119,357,730,577.38 - Step 5: Solve for x
x = 119,357,730,577.38/398,395.76 - Step 6: Final answer
x = 299,595.89
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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.