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Finding the Fourth Proportional to 521,451.60, 782,177.40 and 403,353.60

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Solution

The fourth proportional to 521,451.60, 782,177.40 and 403,353.60 is: 605,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,451.60 : 782,177.40 = 403,353.60 : x
  2. Step 2: Convert to fraction form
    521,451.60/782,177.40 = 403,353.60/x
  3. Step 3: Cross multiply
    521,451.60x = 782,177.40 × 403,353.60
  4. Step 4: Simplify right side
    521,451.60x = 315,494,070,128.64
  5. Step 5: Solve for x
    x = 315,494,070,128.64/521,451.60
  6. Step 6: Final answer
    x = 605,030.40

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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.