Finding the Fourth Proportional to 659,121.36, 909,266.76 and 390,659.28
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Solution
The fourth proportional to 659,121.36, 909,266.76 and 390,659.28 is: 538,919.72
Step by Step Solution
- Step 1: Write the proportion equation
659,121.36 : 909,266.76 = 390,659.28 : x - Step 2: Convert to fraction form
659,121.36/909,266.76 = 390,659.28/x - Step 3: Cross multiply
659,121.36x = 909,266.76 × 390,659.28 - Step 4: Simplify right side
659,121.36x = 355,213,497,789.53 - Step 5: Solve for x
x = 355,213,497,789.53/659,121.36 - Step 6: Final answer
x = 538,919.72
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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.