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Finding the Fourth Proportional to 3,856.62, 5,312.61 and 3,658.98

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Solution

The fourth proportional to 3,856.62, 5,312.61 and 3,658.98 is: 5,040.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.62 : 5,312.61 = 3,658.98 : x
  2. Step 2: Convert to fraction form
    3,856.62/5,312.61 = 3,658.98/x
  3. Step 3: Cross multiply
    3,856.62x = 5,312.61 × 3,658.98
  4. Step 4: Simplify right side
    3,856.62x = 19,438,733.74
  5. Step 5: Solve for x
    x = 19,438,733.74/3,856.62
  6. Step 6: Final answer
    x = 5,040.35

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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.