Home / 445,819.60-668,729.40-421,325.20

Finding the Fourth Proportional to 445,819.60, 668,729.40 and 421,325.20

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Solution

The fourth proportional to 445,819.60, 668,729.40 and 421,325.20 is: 631,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,819.60 : 668,729.40 = 421,325.20 : x
  2. Step 2: Convert to fraction form
    445,819.60/668,729.40 = 421,325.20/x
  3. Step 3: Cross multiply
    445,819.60x = 668,729.40 × 421,325.20
  4. Step 4: Simplify right side
    445,819.60x = 281,752,548,200.88
  5. Step 5: Solve for x
    x = 281,752,548,200.88/445,819.60
  6. Step 6: Final answer
    x = 631,987.80

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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.