Home / 831,390.40-1,247,452.80-404,689.60

Finding the Fourth Proportional to 831,390.40, 1,247,452.80 and 404,689.60

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Solution

The fourth proportional to 831,390.40, 1,247,452.80 and 404,689.60 is: 607,213.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,390.40 : 1,247,452.80 = 404,689.60 : x
  2. Step 2: Convert to fraction form
    831,390.40/1,247,452.80 = 404,689.60/x
  3. Step 3: Cross multiply
    831,390.40x = 1,247,452.80 × 404,689.60
  4. Step 4: Simplify right side
    831,390.40x = 504,831,174,650.88
  5. Step 5: Solve for x
    x = 504,831,174,650.88/831,390.40
  6. Step 6: Final answer
    x = 607,213.14

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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.