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Finding the Fourth Proportional to 852.60, 1,277.73 and 440.90

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Solution

The fourth proportional to 852.60, 1,277.73 and 440.90 is: 660.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.60 : 1,277.73 = 440.90 : x
  2. Step 2: Convert to fraction form
    852.60/1,277.73 = 440.90/x
  3. Step 3: Cross multiply
    852.60x = 1,277.73 × 440.90
  4. Step 4: Simplify right side
    852.60x = 563,351.16
  5. Step 5: Solve for x
    x = 563,351.16/852.60
  6. Step 6: Final answer
    x = 660.74

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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.