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Finding the Fourth Proportional to 307,918.80, 461,878.20 and 265,928.40

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Solution

The fourth proportional to 307,918.80, 461,878.20 and 265,928.40 is: 398,892.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,918.80 : 461,878.20 = 265,928.40 : x
  2. Step 2: Convert to fraction form
    307,918.80/461,878.20 = 265,928.40/x
  3. Step 3: Cross multiply
    307,918.80x = 461,878.20 × 265,928.40
  4. Step 4: Simplify right side
    307,918.80x = 122,826,530,720.88
  5. Step 5: Solve for x
    x = 122,826,530,720.88/307,918.80
  6. Step 6: Final answer
    x = 398,892.60

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1.5x scale

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.