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Finding the Fourth Proportional to 404,692.21, 558,542.78 and 386,755.57

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Solution

The fourth proportional to 404,692.21, 558,542.78 and 386,755.57 is: 533,787.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,692.21 : 558,542.78 = 386,755.57 : x
  2. Step 2: Convert to fraction form
    404,692.21/558,542.78 = 386,755.57/x
  3. Step 3: Cross multiply
    404,692.21x = 558,542.78 × 386,755.57
  4. Step 4: Simplify right side
    404,692.21x = 216,019,530,818.82
  5. Step 5: Solve for x
    x = 216,019,530,818.82/404,692.21
  6. Step 6: Final answer
    x = 533,787.23

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1.5x scale

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.