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Finding the Fourth Proportional to 5,333.80, 7,991.10 and 4,719.40

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Solution

The fourth proportional to 5,333.80, 7,991.10 and 4,719.40 is: 7,070.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,333.80 : 7,991.10 = 4,719.40 : x
  2. Step 2: Convert to fraction form
    5,333.80/7,991.10 = 4,719.40/x
  3. Step 3: Cross multiply
    5,333.80x = 7,991.10 × 4,719.40
  4. Step 4: Simplify right side
    5,333.80x = 37,713,197.34
  5. Step 5: Solve for x
    x = 37,713,197.34/5,333.80
  6. Step 6: Final answer
    x = 7,070.61

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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.