Home / 458,623.44-687,120.44-391,381.20

Finding the Fourth Proportional to 458,623.44, 687,120.44 and 391,381.20

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Solution

The fourth proportional to 458,623.44, 687,120.44 and 391,381.20 is: 586,376.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,623.44 : 687,120.44 = 391,381.20 : x
  2. Step 2: Convert to fraction form
    458,623.44/687,120.44 = 391,381.20/x
  3. Step 3: Cross multiply
    458,623.44x = 687,120.44 × 391,381.20
  4. Step 4: Simplify right side
    458,623.44x = 268,926,022,351.73
  5. Step 5: Solve for x
    x = 268,926,022,351.73/458,623.44
  6. Step 6: Final answer
    x = 586,376.53

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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.