Home / 693,420.20-1,040,130.30-426,314.60

Finding the Fourth Proportional to 693,420.20, 1,040,130.30 and 426,314.60

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Solution

The fourth proportional to 693,420.20, 1,040,130.30 and 426,314.60 is: 639,471.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,420.20 : 1,040,130.30 = 426,314.60 : x
  2. Step 2: Convert to fraction form
    693,420.20/1,040,130.30 = 426,314.60/x
  3. Step 3: Cross multiply
    693,420.20x = 1,040,130.30 × 426,314.60
  4. Step 4: Simplify right side
    693,420.20x = 443,422,732,792.38
  5. Step 5: Solve for x
    x = 443,422,732,792.38/693,420.20
  6. Step 6: Final answer
    x = 639,471.90

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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.