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Finding the Fourth Proportional to 4,788, 6,605.20 and 3,391.52

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Solution

The fourth proportional to 4,788, 6,605.20 and 3,391.52 is: 4,678.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,788 : 6,605.20 = 3,391.52 : x
  2. Step 2: Convert to fraction form
    4,788/6,605.20 = 3,391.52/x
  3. Step 3: Cross multiply
    4,788x = 6,605.20 × 3,391.52
  4. Step 4: Simplify right side
    4,788x = 22,401,667.90
  5. Step 5: Solve for x
    x = 22,401,667.90/4,788
  6. Step 6: Final answer
    x = 4,678.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.