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Finding the Fourth Proportional to 4,672.64, 7,008.12 and 1,209.68

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Solution

The fourth proportional to 4,672.64, 7,008.12 and 1,209.68 is: 1,814.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,672.64 : 7,008.12 = 1,209.68 : x
  2. Step 2: Convert to fraction form
    4,672.64/7,008.12 = 1,209.68/x
  3. Step 3: Cross multiply
    4,672.64x = 7,008.12 × 1,209.68
  4. Step 4: Simplify right side
    4,672.64x = 8,477,582.60
  5. Step 5: Solve for x
    x = 8,477,582.60/4,672.64
  6. Step 6: Final answer
    x = 1,814.30

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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.