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Finding the Fourth Proportional to 521,604.20, 782,406.30 and 403,360.40

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Solution

The fourth proportional to 521,604.20, 782,406.30 and 403,360.40 is: 605,040.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,604.20 : 782,406.30 = 403,360.40 : x
  2. Step 2: Convert to fraction form
    521,604.20/782,406.30 = 403,360.40/x
  3. Step 3: Cross multiply
    521,604.20x = 782,406.30 × 403,360.40
  4. Step 4: Simplify right side
    521,604.20x = 315,591,718,130.52
  5. Step 5: Solve for x
    x = 315,591,718,130.52/521,604.20
  6. Step 6: Final answer
    x = 605,040.60

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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.