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Finding the Fourth Proportional to 3,390.80, 5,088.36 and 1,443

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Solution

The fourth proportional to 3,390.80, 5,088.36 and 1,443 is: 2,165.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.80 : 5,088.36 = 1,443 : x
  2. Step 2: Convert to fraction form
    3,390.80/5,088.36 = 1,443/x
  3. Step 3: Cross multiply
    3,390.80x = 5,088.36 × 1,443
  4. Step 4: Simplify right side
    3,390.80x = 7,342,503.48
  5. Step 5: Solve for x
    x = 7,342,503.48/3,390.80
  6. Step 6: Final answer
    x = 2,165.42

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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.