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Finding the Fourth Proportional to 3,210.76, 4,809.64 and 1,668.52

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Solution

The fourth proportional to 3,210.76, 4,809.64 and 1,668.52 is: 2,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,210.76 : 4,809.64 = 1,668.52 : x
  2. Step 2: Convert to fraction form
    3,210.76/4,809.64 = 1,668.52/x
  3. Step 3: Cross multiply
    3,210.76x = 4,809.64 × 1,668.52
  4. Step 4: Simplify right side
    3,210.76x = 8,024,980.53
  5. Step 5: Solve for x
    x = 8,024,980.53/3,210.76
  6. Step 6: Final answer
    x = 2,499.40

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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.