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Finding the Fourth Proportional to 3,091, 4,635.90 and 1,705

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Solution

The fourth proportional to 3,091, 4,635.90 and 1,705 is: 2,557.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,091 : 4,635.90 = 1,705 : x
  2. Step 2: Convert to fraction form
    3,091/4,635.90 = 1,705/x
  3. Step 3: Cross multiply
    3,091x = 4,635.90 × 1,705
  4. Step 4: Simplify right side
    3,091x = 7,904,209.50
  5. Step 5: Solve for x
    x = 7,904,209.50/3,091
  6. Step 6: Final answer
    x = 2,557.17

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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.