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Finding the Fourth Proportional to 1,565.25, 2,346.85 and 640.56

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Solution

The fourth proportional to 1,565.25, 2,346.85 and 640.56 is: 960.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.25 : 2,346.85 = 640.56 : x
  2. Step 2: Convert to fraction form
    1,565.25/2,346.85 = 640.56/x
  3. Step 3: Cross multiply
    1,565.25x = 2,346.85 × 640.56
  4. Step 4: Simplify right side
    1,565.25x = 1,503,292.83
  5. Step 5: Solve for x
    x = 1,503,292.83/1,565.25
  6. Step 6: Final answer
    x = 960.42

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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.