Finding the Fourth Proportional to 696,690.76, 961,420.80 and 390,767.80
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Solution
The fourth proportional to 696,690.76, 961,420.80 and 390,767.80 is: 539,252.58
Step by Step Solution
- Step 1: Write the proportion equation
696,690.76 : 961,420.80 = 390,767.80 : x - Step 2: Convert to fraction form
696,690.76/961,420.80 = 390,767.80/x - Step 3: Cross multiply
696,690.76x = 961,420.80 × 390,767.80 - Step 4: Simplify right side
696,690.76x = 375,692,290,890.24 - Step 5: Solve for x
x = 375,692,290,890.24/696,690.76 - Step 6: Final answer
x = 539,252.58
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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.