Finding the Fourth Proportional to 390,597.75, 539,028.14 and 211,749.75
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Solution
The fourth proportional to 390,597.75, 539,028.14 and 211,749.75 is: 292,216.41
Step by Step Solution
- Step 1: Write the proportion equation
390,597.75 : 539,028.14 = 211,749.75 : x - Step 2: Convert to fraction form
390,597.75/539,028.14 = 211,749.75/x - Step 3: Cross multiply
390,597.75x = 539,028.14 × 211,749.75 - Step 4: Simplify right side
390,597.75x = 114,139,072,829.22 - Step 5: Solve for x
x = 114,139,072,829.22/390,597.75 - Step 6: Final answer
x = 292,216.41
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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.