Home / 458,974.08-687,968.91-221,990.76

Finding the Fourth Proportional to 458,974.08, 687,968.91 and 221,990.76

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Solution

The fourth proportional to 458,974.08, 687,968.91 and 221,990.76 is: 332,748.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,974.08 : 687,968.91 = 221,990.76 : x
  2. Step 2: Convert to fraction form
    458,974.08/687,968.91 = 221,990.76/x
  3. Step 3: Cross multiply
    458,974.08x = 687,968.91 × 221,990.76
  4. Step 4: Simplify right side
    458,974.08x = 152,722,741,187.27
  5. Step 5: Solve for x
    x = 152,722,741,187.27/458,974.08
  6. Step 6: Final answer
    x = 332,748.07

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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.