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Finding the Fourth Proportional to 262,857.20, 394,285.80 and 260,092.40

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Solution

The fourth proportional to 262,857.20, 394,285.80 and 260,092.40 is: 390,138.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,857.20 : 394,285.80 = 260,092.40 : x
  2. Step 2: Convert to fraction form
    262,857.20/394,285.80 = 260,092.40/x
  3. Step 3: Cross multiply
    262,857.20x = 394,285.80 × 260,092.40
  4. Step 4: Simplify right side
    262,857.20x = 102,550,740,007.92
  5. Step 5: Solve for x
    x = 102,550,740,007.92/262,857.20
  6. Step 6: Final answer
    x = 390,138.60

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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.