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Finding the Fourth Proportional to 262,078.80, 393,118.20 and 257,704.80

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Solution

The fourth proportional to 262,078.80, 393,118.20 and 257,704.80 is: 386,557.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,078.80 : 393,118.20 = 257,704.80 : x
  2. Step 2: Convert to fraction form
    262,078.80/393,118.20 = 257,704.80/x
  3. Step 3: Cross multiply
    262,078.80x = 393,118.20 × 257,704.80
  4. Step 4: Simplify right side
    262,078.80x = 101,308,447,107.36
  5. Step 5: Solve for x
    x = 101,308,447,107.36/262,078.80
  6. Step 6: Final answer
    x = 386,557.20

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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.