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Finding the Fourth Proportional to 3,931.99, 5,425.21 and 2,658.25

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Solution

The fourth proportional to 3,931.99, 5,425.21 and 2,658.25 is: 3,667.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.99 : 5,425.21 = 2,658.25 : x
  2. Step 2: Convert to fraction form
    3,931.99/5,425.21 = 2,658.25/x
  3. Step 3: Cross multiply
    3,931.99x = 5,425.21 × 2,658.25
  4. Step 4: Simplify right side
    3,931.99x = 14,421,564.48
  5. Step 5: Solve for x
    x = 14,421,564.48/3,931.99
  6. Step 6: Final answer
    x = 3,667.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.