Home / 458,320.20-687,480.30-298,890.60

Finding the Fourth Proportional to 458,320.20, 687,480.30 and 298,890.60

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Solution

The fourth proportional to 458,320.20, 687,480.30 and 298,890.60 is: 448,335.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,320.20 : 687,480.30 = 298,890.60 : x
  2. Step 2: Convert to fraction form
    458,320.20/687,480.30 = 298,890.60/x
  3. Step 3: Cross multiply
    458,320.20x = 687,480.30 × 298,890.60
  4. Step 4: Simplify right side
    458,320.20x = 205,481,399,355.18
  5. Step 5: Solve for x
    x = 205,481,399,355.18/458,320.20
  6. Step 6: Final answer
    x = 448,335.90

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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.