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Finding the Fourth Proportional to 262,900.80, 394,610.40 and 129,931.20

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Solution

The fourth proportional to 262,900.80, 394,610.40 and 129,931.20 is: 195,024.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,900.80 : 394,610.40 = 129,931.20 : x
  2. Step 2: Convert to fraction form
    262,900.80/394,610.40 = 129,931.20/x
  3. Step 3: Cross multiply
    262,900.80x = 394,610.40 × 129,931.20
  4. Step 4: Simplify right side
    262,900.80x = 51,272,202,804.48
  5. Step 5: Solve for x
    x = 51,272,202,804.48/262,900.80
  6. Step 6: Final answer
    x = 195,024.90

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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.