Home / 645,947.40-968,921.10-505,825.80

Finding the Fourth Proportional to 645,947.40, 968,921.10 and 505,825.80

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Solution

The fourth proportional to 645,947.40, 968,921.10 and 505,825.80 is: 758,738.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,947.40 : 968,921.10 = 505,825.80 : x
  2. Step 2: Convert to fraction form
    645,947.40/968,921.10 = 505,825.80/x
  3. Step 3: Cross multiply
    645,947.40x = 968,921.10 × 505,825.80
  4. Step 4: Simplify right side
    645,947.40x = 490,105,290,544.38
  5. Step 5: Solve for x
    x = 490,105,290,544.38/645,947.40
  6. Step 6: Final answer
    x = 758,738.70

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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.