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Finding the Fourth Proportional to 371,692.40, 512,979.48 and 220,790

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Solution

The fourth proportional to 371,692.40, 512,979.48 and 220,790 is: 304,716.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,692.40 : 512,979.48 = 220,790 : x
  2. Step 2: Convert to fraction form
    371,692.40/512,979.48 = 220,790/x
  3. Step 3: Cross multiply
    371,692.40x = 512,979.48 × 220,790
  4. Step 4: Simplify right side
    371,692.40x = 113,260,739,389.20
  5. Step 5: Solve for x
    x = 113,260,739,389.20/371,692.40
  6. Step 6: Final answer
    x = 304,716.32

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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.