Home / 445,821.60-668,732.40-421,327.20

Finding the Fourth Proportional to 445,821.60, 668,732.40 and 421,327.20

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Solution

The fourth proportional to 445,821.60, 668,732.40 and 421,327.20 is: 631,990.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,821.60 : 668,732.40 = 421,327.20 : x
  2. Step 2: Convert to fraction form
    445,821.60/668,732.40 = 421,327.20/x
  3. Step 3: Cross multiply
    445,821.60x = 668,732.40 × 421,327.20
  4. Step 4: Simplify right side
    445,821.60x = 281,755,149,641.28
  5. Step 5: Solve for x
    x = 281,755,149,641.28/445,821.60
  6. Step 6: Final answer
    x = 631,990.80

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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.