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Finding the Fourth Proportional to 245,203.20, 338,407.20 and 149,709.60

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Solution

The fourth proportional to 245,203.20, 338,407.20 and 149,709.60 is: 206,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,203.20 : 338,407.20 = 149,709.60 : x
  2. Step 2: Convert to fraction form
    245,203.20/338,407.20 = 149,709.60/x
  3. Step 3: Cross multiply
    245,203.20x = 338,407.20 × 149,709.60
  4. Step 4: Simplify right side
    245,203.20x = 50,662,806,549.12
  5. Step 5: Solve for x
    x = 50,662,806,549.12/245,203.20
  6. Step 6: Final answer
    x = 206,615.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.