Home / 925,685.78-1,388,029.40-419,970.81

Finding the Fourth Proportional to 925,685.78, 1,388,029.40 and 419,970.81

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Solution

The fourth proportional to 925,685.78, 1,388,029.40 and 419,970.81 is: 629,729.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    925,685.78 : 1,388,029.40 = 419,970.81 : x
  2. Step 2: Convert to fraction form
    925,685.78/1,388,029.40 = 419,970.81/x
  3. Step 3: Cross multiply
    925,685.78x = 1,388,029.40 × 419,970.81
  4. Step 4: Simplify right side
    925,685.78x = 582,931,831,421.81
  5. Step 5: Solve for x
    x = 582,931,831,421.81/925,685.78
  6. Step 6: Final answer
    x = 629,729.70

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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.