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Finding the Fourth Proportional to 5,209.84, 7,815.96 and 1,747

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Solution

The fourth proportional to 5,209.84, 7,815.96 and 1,747 is: 2,620.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,209.84 : 7,815.96 = 1,747 : x
  2. Step 2: Convert to fraction form
    5,209.84/7,815.96 = 1,747/x
  3. Step 3: Cross multiply
    5,209.84x = 7,815.96 × 1,747
  4. Step 4: Simplify right side
    5,209.84x = 13,654,482.12
  5. Step 5: Solve for x
    x = 13,654,482.12/5,209.84
  6. Step 6: Final answer
    x = 2,620.90

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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.