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Finding the Fourth Proportional to 425,521.60, 638,512.80 and 188,900.80

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Solution

The fourth proportional to 425,521.60, 638,512.80 and 188,900.80 is: 283,453.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,521.60 : 638,512.80 = 188,900.80 : x
  2. Step 2: Convert to fraction form
    425,521.60/638,512.80 = 188,900.80/x
  3. Step 3: Cross multiply
    425,521.60x = 638,512.80 × 188,900.80
  4. Step 4: Simplify right side
    425,521.60x = 120,615,578,730.24
  5. Step 5: Solve for x
    x = 120,615,578,730.24/425,521.60
  6. Step 6: Final answer
    x = 283,453.48

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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.