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Finding the Fourth Proportional to 3,137.40, 4,708.02 and 1,289.40

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Solution

The fourth proportional to 3,137.40, 4,708.02 and 1,289.40 is: 1,934.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,137.40 : 4,708.02 = 1,289.40 : x
  2. Step 2: Convert to fraction form
    3,137.40/4,708.02 = 1,289.40/x
  3. Step 3: Cross multiply
    3,137.40x = 4,708.02 × 1,289.40
  4. Step 4: Simplify right side
    3,137.40x = 6,070,520.99
  5. Step 5: Solve for x
    x = 6,070,520.99/3,137.40
  6. Step 6: Final answer
    x = 1,934.89

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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.