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Finding the Fourth Proportional to 521,534.40, 782,301.60 and 486,542.40

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Solution

The fourth proportional to 521,534.40, 782,301.60 and 486,542.40 is: 729,813.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,534.40 : 782,301.60 = 486,542.40 : x
  2. Step 2: Convert to fraction form
    521,534.40/782,301.60 = 486,542.40/x
  3. Step 3: Cross multiply
    521,534.40x = 782,301.60 × 486,542.40
  4. Step 4: Simplify right side
    521,534.40x = 380,622,897,987.84
  5. Step 5: Solve for x
    x = 380,622,897,987.84/521,534.40
  6. Step 6: Final answer
    x = 729,813.60

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Double scale
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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.