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Finding the Fourth Proportional to 539,128.60, 808,692.90 and 486,640.60

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Solution

The fourth proportional to 539,128.60, 808,692.90 and 486,640.60 is: 729,960.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,128.60 : 808,692.90 = 486,640.60 : x
  2. Step 2: Convert to fraction form
    539,128.60/808,692.90 = 486,640.60/x
  3. Step 3: Cross multiply
    539,128.60x = 808,692.90 × 486,640.60
  4. Step 4: Simplify right side
    539,128.60x = 393,542,798,071.74
  5. Step 5: Solve for x
    x = 393,542,798,071.74/539,128.60
  6. Step 6: Final answer
    x = 729,960.90

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.