Home / 876,138.20-1,314,207.30-315,099.80

Finding the Fourth Proportional to 876,138.20, 1,314,207.30 and 315,099.80

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Solution

The fourth proportional to 876,138.20, 1,314,207.30 and 315,099.80 is: 472,649.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,138.20 : 1,314,207.30 = 315,099.80 : x
  2. Step 2: Convert to fraction form
    876,138.20/1,314,207.30 = 315,099.80/x
  3. Step 3: Cross multiply
    876,138.20x = 1,314,207.30 × 315,099.80
  4. Step 4: Simplify right side
    876,138.20x = 414,106,457,388.54
  5. Step 5: Solve for x
    x = 414,106,457,388.54/876,138.20
  6. Step 6: Final answer
    x = 472,649.70

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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.