Home / 389,112.10-583,121.40-309,286.60

Finding the Fourth Proportional to 389,112.10, 583,121.40 and 309,286.60

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Solution

The fourth proportional to 389,112.10, 583,121.40 and 309,286.60 is: 463,495.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,112.10 : 583,121.40 = 309,286.60 : x
  2. Step 2: Convert to fraction form
    389,112.10/583,121.40 = 309,286.60/x
  3. Step 3: Cross multiply
    389,112.10x = 583,121.40 × 309,286.60
  4. Step 4: Simplify right side
    389,112.10x = 180,351,635,193.24
  5. Step 5: Solve for x
    x = 180,351,635,193.24/389,112.10
  6. Step 6: Final answer
    x = 463,495.31

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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.