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Finding the Fourth Proportional to 5,800.40, 8,700.60 and 2,103.20

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Solution

The fourth proportional to 5,800.40, 8,700.60 and 2,103.20 is: 3,154.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,800.40 : 8,700.60 = 2,103.20 : x
  2. Step 2: Convert to fraction form
    5,800.40/8,700.60 = 2,103.20/x
  3. Step 3: Cross multiply
    5,800.40x = 8,700.60 × 2,103.20
  4. Step 4: Simplify right side
    5,800.40x = 18,299,101.92
  5. Step 5: Solve for x
    x = 18,299,101.92/5,800.40
  6. Step 6: Final answer
    x = 3,154.80

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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.