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Finding the Fourth Proportional to 539,230.40, 808,845.60 and 389,931.20

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Solution

The fourth proportional to 539,230.40, 808,845.60 and 389,931.20 is: 584,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,230.40 : 808,845.60 = 389,931.20 : x
  2. Step 2: Convert to fraction form
    539,230.40/808,845.60 = 389,931.20/x
  3. Step 3: Cross multiply
    539,230.40x = 808,845.60 × 389,931.20
  4. Step 4: Simplify right side
    539,230.40x = 315,394,135,422.72
  5. Step 5: Solve for x
    x = 315,394,135,422.72/539,230.40
  6. Step 6: Final answer
    x = 584,896.80

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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.