Home / 825,905.21-1,140,237.77-520,243.61

Finding the Fourth Proportional to 825,905.21, 1,140,237.77 and 520,243.61

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Solution

The fourth proportional to 825,905.21, 1,140,237.77 and 520,243.61 is: 718,243.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,905.21 : 1,140,237.77 = 520,243.61 : x
  2. Step 2: Convert to fraction form
    825,905.21/1,140,237.77 = 520,243.61/x
  3. Step 3: Cross multiply
    825,905.21x = 1,140,237.77 × 520,243.61
  4. Step 4: Simplify right side
    825,905.21x = 593,201,405,420.74
  5. Step 5: Solve for x
    x = 593,201,405,420.74/825,905.21
  6. Step 6: Final answer
    x = 718,243.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.