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Finding the Fourth Proportional to 262,005.28, 392,969.64 and 128,849.80

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Solution

The fourth proportional to 262,005.28, 392,969.64 and 128,849.80 is: 193,255.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,005.28 : 392,969.64 = 128,849.80 : x
  2. Step 2: Convert to fraction form
    262,005.28/392,969.64 = 128,849.80/x
  3. Step 3: Cross multiply
    262,005.28x = 392,969.64 × 128,849.80
  4. Step 4: Simplify right side
    262,005.28x = 50,634,059,520.07
  5. Step 5: Solve for x
    x = 50,634,059,520.07/262,005.28
  6. Step 6: Final answer
    x = 193,255.87

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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.