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Finding the Fourth Proportional to 2,565.65, 3,848.60 and 786.58

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Solution

The fourth proportional to 2,565.65, 3,848.60 and 786.58 is: 1,179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,565.65 : 3,848.60 = 786.58 : x
  2. Step 2: Convert to fraction form
    2,565.65/3,848.60 = 786.58/x
  3. Step 3: Cross multiply
    2,565.65x = 3,848.60 × 786.58
  4. Step 4: Simplify right side
    2,565.65x = 3,027,227.86
  5. Step 5: Solve for x
    x = 3,027,227.86/2,565.65
  6. Step 6: Final answer
    x = 1,179.91

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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.