Finding the Fourth Proportional to 390,828.52, 539,343.12 and 211,980.52
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Solution
The fourth proportional to 390,828.52, 539,343.12 and 211,980.52 is: 292,532.99
Step by Step Solution
- Step 1: Write the proportion equation
390,828.52 : 539,343.12 = 211,980.52 : x - Step 2: Convert to fraction form
390,828.52/539,343.12 = 211,980.52/x - Step 3: Cross multiply
390,828.52x = 539,343.12 × 211,980.52 - Step 4: Simplify right side
390,828.52x = 114,330,235,036.02 - Step 5: Solve for x
x = 114,330,235,036.02/390,828.52 - Step 6: Final answer
x = 292,532.99
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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.