Home / 752,318.40-1,038,200.64-412,789.20

Finding the Fourth Proportional to 752,318.40, 1,038,200.64 and 412,789.20

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Solution

The fourth proportional to 752,318.40, 1,038,200.64 and 412,789.20 is: 569,649.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    752,318.40 : 1,038,200.64 = 412,789.20 : x
  2. Step 2: Convert to fraction form
    752,318.40/1,038,200.64 = 412,789.20/x
  3. Step 3: Cross multiply
    752,318.40x = 1,038,200.64 × 412,789.20
  4. Step 4: Simplify right side
    752,318.40x = 428,558,011,625.09
  5. Step 5: Solve for x
    x = 428,558,011,625.09/752,318.40
  6. Step 6: Final answer
    x = 569,649.78

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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.