Finding the Fourth Proportional to 398,398.59, 549,774.06 and 217,106.66
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Solution
The fourth proportional to 398,398.59, 549,774.06 and 217,106.66 is: 299,598.47
Step by Step Solution
- Step 1: Write the proportion equation
398,398.59 : 549,774.06 = 217,106.66 : x - Step 2: Convert to fraction form
398,398.59/549,774.06 = 217,106.66/x - Step 3: Cross multiply
398,398.59x = 549,774.06 × 217,106.66 - Step 4: Simplify right side
398,398.59x = 119,359,609,921.24 - Step 5: Solve for x
x = 119,359,609,921.24/398,398.59 - Step 6: Final answer
x = 299,598.47
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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.