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Finding the Fourth Proportional to 2,430, 3,645.28 and 786.48

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Solution

The fourth proportional to 2,430, 3,645.28 and 786.48 is: 1,179.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,430 : 3,645.28 = 786.48 : x
  2. Step 2: Convert to fraction form
    2,430/3,645.28 = 786.48/x
  3. Step 3: Cross multiply
    2,430x = 3,645.28 × 786.48
  4. Step 4: Simplify right side
    2,430x = 2,866,939.81
  5. Step 5: Solve for x
    x = 2,866,939.81/2,430
  6. Step 6: Final answer
    x = 1,179.81

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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.