Finding the Fourth Proportional to 390,991.18, 539,567.49 and 212,143.18
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Solution
The fourth proportional to 390,991.18, 539,567.49 and 212,143.18 is: 292,757.40
Step by Step Solution
- Step 1: Write the proportion equation
390,991.18 : 539,567.49 = 212,143.18 : x - Step 2: Convert to fraction form
390,991.18/539,567.49 = 212,143.18/x - Step 3: Cross multiply
390,991.18x = 539,567.49 × 212,143.18 - Step 4: Simplify right side
390,991.18x = 114,465,563,153.22 - Step 5: Solve for x
x = 114,465,563,153.22/390,991.18 - Step 6: Final answer
x = 292,757.40
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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.