Finding the Fourth Proportional to 717,459.55, 990,100.88 and 395,170.81
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Solution
The fourth proportional to 717,459.55, 990,100.88 and 395,170.81 is: 545,339.41
Step by Step Solution
- Step 1: Write the proportion equation
717,459.55 : 990,100.88 = 395,170.81 : x - Step 2: Convert to fraction form
717,459.55/990,100.88 = 395,170.81/x - Step 3: Cross multiply
717,459.55x = 990,100.88 × 395,170.81 - Step 4: Simplify right side
717,459.55x = 391,258,966,731.31 - Step 5: Solve for x
x = 391,258,966,731.31/717,459.55 - Step 6: Final answer
x = 545,339.41
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Double scale
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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.