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Finding the Fourth Proportional to 4,748.78, 7,123.22 and 3,115.68

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Solution

The fourth proportional to 4,748.78, 7,123.22 and 3,115.68 is: 4,673.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,748.78 : 7,123.22 = 3,115.68 : x
  2. Step 2: Convert to fraction form
    4,748.78/7,123.22 = 3,115.68/x
  3. Step 3: Cross multiply
    4,748.78x = 7,123.22 × 3,115.68
  4. Step 4: Simplify right side
    4,748.78x = 22,193,658.51
  5. Step 5: Solve for x
    x = 22,193,658.51/4,748.78
  6. Step 6: Final answer
    x = 4,673.55

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1.5x scale

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.