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Finding the Fourth Proportional to 4,980.39, 7,470.03 and 3,126

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Solution

The fourth proportional to 4,980.39, 7,470.03 and 3,126 is: 4,688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,980.39 : 7,470.03 = 3,126 : x
  2. Step 2: Convert to fraction form
    4,980.39/7,470.03 = 3,126/x
  3. Step 3: Cross multiply
    4,980.39x = 7,470.03 × 3,126
  4. Step 4: Simplify right side
    4,980.39x = 23,351,313.78
  5. Step 5: Solve for x
    x = 23,351,313.78/4,980.39
  6. Step 6: Final answer
    x = 4,688.65

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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.