Finding the Fourth Proportional to 391,115.71, 539,739.90 and 212,267.71
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Solution
The fourth proportional to 391,115.71, 539,739.90 and 212,267.71 is: 292,929.55
Step by Step Solution
- Step 1: Write the proportion equation
391,115.71 : 539,739.90 = 212,267.71 : x - Step 2: Convert to fraction form
391,115.71/539,739.90 = 212,267.71/x - Step 3: Cross multiply
391,115.71x = 539,739.90 × 212,267.71 - Step 4: Simplify right side
391,115.71x = 114,569,348,808.59 - Step 5: Solve for x
x = 114,569,348,808.59/391,115.71 - Step 6: Final answer
x = 292,929.55
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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.