Finding the Fourth Proportional to 286,637.40, 429,959.70 and 86,959.80
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Solution
The fourth proportional to 286,637.40, 429,959.70 and 86,959.80 is: 130,440.79
Step by Step Solution
- Step 1: Write the proportion equation
286,637.40 : 429,959.70 = 86,959.80 : x - Step 2: Convert to fraction form
286,637.40/429,959.70 = 86,959.80/x - Step 3: Cross multiply
286,637.40x = 429,959.70 × 86,959.80 - Step 4: Simplify right side
286,637.40x = 37,389,209,520.06 - Step 5: Solve for x
x = 37,389,209,520.06/286,637.40 - Step 6: Final answer
x = 130,440.79
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.