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Finding the Fourth Proportional to 875,930.40, 1,314,241.20 and 343,360.80

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Solution

The fourth proportional to 875,930.40, 1,314,241.20 and 343,360.80 is: 515,176.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,930.40 : 1,314,241.20 = 343,360.80 : x
  2. Step 2: Convert to fraction form
    875,930.40/1,314,241.20 = 343,360.80/x
  3. Step 3: Cross multiply
    875,930.40x = 1,314,241.20 × 343,360.80
  4. Step 4: Simplify right side
    875,930.40x = 451,258,909,824.96
  5. Step 5: Solve for x
    x = 451,258,909,824.96/875,930.40
  6. Step 6: Final answer
    x = 515,176.67

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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.