Home / 919,810.38-1,379,900.10-320,610.66

Finding the Fourth Proportional to 919,810.38, 1,379,900.10 and 320,610.66

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Solution

The fourth proportional to 919,810.38, 1,379,900.10 and 320,610.66 is: 480,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,810.38 : 1,379,900.10 = 320,610.66 : x
  2. Step 2: Convert to fraction form
    919,810.38/1,379,900.10 = 320,610.66/x
  3. Step 3: Cross multiply
    919,810.38x = 1,379,900.10 × 320,610.66
  4. Step 4: Simplify right side
    919,810.38x = 442,410,677,822.73
  5. Step 5: Solve for x
    x = 442,410,677,822.73/919,810.38
  6. Step 6: Final answer
    x = 480,980.30

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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.