Finding the Fourth Proportional to 676,742.18, 933,842.09 and 390,206.90
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Solution
The fourth proportional to 676,742.18, 933,842.09 and 390,206.90 is: 538,449.71
Step by Step Solution
- Step 1: Write the proportion equation
676,742.18 : 933,842.09 = 390,206.90 : x - Step 2: Convert to fraction form
676,742.18/933,842.09 = 390,206.90/x - Step 3: Cross multiply
676,742.18x = 933,842.09 × 390,206.90 - Step 4: Simplify right side
676,742.18x = 364,391,630,338.54 - Step 5: Solve for x
x = 364,391,630,338.54/676,742.18 - Step 6: Final answer
x = 538,449.71
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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.