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Finding the Fourth Proportional to 4,692.48, 7,039.41 and 1,405.15

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Solution

The fourth proportional to 4,692.48, 7,039.41 and 1,405.15 is: 2,107.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,692.48 : 7,039.41 = 1,405.15 : x
  2. Step 2: Convert to fraction form
    4,692.48/7,039.41 = 1,405.15/x
  3. Step 3: Cross multiply
    4,692.48x = 7,039.41 × 1,405.15
  4. Step 4: Simplify right side
    4,692.48x = 9,891,404.09
  5. Step 5: Solve for x
    x = 9,891,404.09/4,692.48
  6. Step 6: Final answer
    x = 2,107.93

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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.