Home / 389,111.10-583,119.90-309,285.60

Finding the Fourth Proportional to 389,111.10, 583,119.90 and 309,285.60

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Solution

The fourth proportional to 389,111.10, 583,119.90 and 309,285.60 is: 463,493.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,111.10 : 583,119.90 = 309,285.60 : x
  2. Step 2: Convert to fraction form
    389,111.10/583,119.90 = 309,285.60/x
  3. Step 3: Cross multiply
    389,111.10x = 583,119.90 × 309,285.60
  4. Step 4: Simplify right side
    389,111.10x = 180,350,588,143.44
  5. Step 5: Solve for x
    x = 180,350,588,143.44/389,111.10
  6. Step 6: Final answer
    x = 463,493.81

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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.