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Finding the Fourth Proportional to 4,758.01, 7,137 and 1,909.78

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Solution

The fourth proportional to 4,758.01, 7,137 and 1,909.78 is: 2,864.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,758.01 : 7,137 = 1,909.78 : x
  2. Step 2: Convert to fraction form
    4,758.01/7,137 = 1,909.78/x
  3. Step 3: Cross multiply
    4,758.01x = 7,137 × 1,909.78
  4. Step 4: Simplify right side
    4,758.01x = 13,630,082.02
  5. Step 5: Solve for x
    x = 13,630,082.02/4,758.01
  6. Step 6: Final answer
    x = 2,864.66

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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.