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Finding the Fourth Proportional to 2,692.08, 4,038.16 and 717.75

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Solution

The fourth proportional to 2,692.08, 4,038.16 and 717.75 is: 1,076.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,692.08 : 4,038.16 = 717.75 : x
  2. Step 2: Convert to fraction form
    2,692.08/4,038.16 = 717.75/x
  3. Step 3: Cross multiply
    2,692.08x = 4,038.16 × 717.75
  4. Step 4: Simplify right side
    2,692.08x = 2,898,389.34
  5. Step 5: Solve for x
    x = 2,898,389.34/2,692.08
  6. Step 6: Final answer
    x = 1,076.64

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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.