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Finding the Fourth Proportional to 4,000.40, 5,521.20 and 2,429.30

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Solution

The fourth proportional to 4,000.40, 5,521.20 and 2,429.30 is: 3,352.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,000.40 : 5,521.20 = 2,429.30 : x
  2. Step 2: Convert to fraction form
    4,000.40/5,521.20 = 2,429.30/x
  3. Step 3: Cross multiply
    4,000.40x = 5,521.20 × 2,429.30
  4. Step 4: Simplify right side
    4,000.40x = 13,412,651.16
  5. Step 5: Solve for x
    x = 13,412,651.16/4,000.40
  6. Step 6: Final answer
    x = 3,352.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.