Home / 445,822.60-668,733.90-421,328.20

Finding the Fourth Proportional to 445,822.60, 668,733.90 and 421,328.20

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Solution

The fourth proportional to 445,822.60, 668,733.90 and 421,328.20 is: 631,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,822.60 : 668,733.90 = 421,328.20 : x
  2. Step 2: Convert to fraction form
    445,822.60/668,733.90 = 421,328.20/x
  3. Step 3: Cross multiply
    445,822.60x = 668,733.90 × 421,328.20
  4. Step 4: Simplify right side
    445,822.60x = 281,756,450,365.98
  5. Step 5: Solve for x
    x = 281,756,450,365.98/445,822.60
  6. Step 6: Final answer
    x = 631,992.30

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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.