Home / 490,220.40-676,399.20-286,178.72

Finding the Fourth Proportional to 490,220.40, 676,399.20 and 286,178.72

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Solution

The fourth proportional to 490,220.40, 676,399.20 and 286,178.72 is: 394,865.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,220.40 : 676,399.20 = 286,178.72 : x
  2. Step 2: Convert to fraction form
    490,220.40/676,399.20 = 286,178.72/x
  3. Step 3: Cross multiply
    490,220.40x = 676,399.20 × 286,178.72
  4. Step 4: Simplify right side
    490,220.40x = 193,571,057,265.02
  5. Step 5: Solve for x
    x = 193,571,057,265.02/490,220.40
  6. Step 6: Final answer
    x = 394,865.37

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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.