Home / 919,970.80-1,379,956.20-415,101.85

Finding the Fourth Proportional to 919,970.80, 1,379,956.20 and 415,101.85

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Solution

The fourth proportional to 919,970.80, 1,379,956.20 and 415,101.85 is: 622,652.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,970.80 : 1,379,956.20 = 415,101.85 : x
  2. Step 2: Convert to fraction form
    919,970.80/1,379,956.20 = 415,101.85/x
  3. Step 3: Cross multiply
    919,970.80x = 1,379,956.20 × 415,101.85
  4. Step 4: Simplify right side
    919,970.80x = 572,822,371,538.97
  5. Step 5: Solve for x
    x = 572,822,371,538.97/919,970.80
  6. Step 6: Final answer
    x = 622,652.78

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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.