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Finding the Fourth Proportional to 425,340.40, 638,010.60 and 129,852.40

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Solution

The fourth proportional to 425,340.40, 638,010.60 and 129,852.40 is: 194,778.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,340.40 : 638,010.60 = 129,852.40 : x
  2. Step 2: Convert to fraction form
    425,340.40/638,010.60 = 129,852.40/x
  3. Step 3: Cross multiply
    425,340.40x = 638,010.60 × 129,852.40
  4. Step 4: Simplify right side
    425,340.40x = 82,847,207,635.44
  5. Step 5: Solve for x
    x = 82,847,207,635.44/425,340.40
  6. Step 6: Final answer
    x = 194,778.60

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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.