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Finding the Fourth Proportional to 406.72, 606.84 and 365.72

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Solution

The fourth proportional to 406.72, 606.84 and 365.72 is: 545.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.72 : 606.84 = 365.72 : x
  2. Step 2: Convert to fraction form
    406.72/606.84 = 365.72/x
  3. Step 3: Cross multiply
    406.72x = 606.84 × 365.72
  4. Step 4: Simplify right side
    406.72x = 221,933.52
  5. Step 5: Solve for x
    x = 221,933.52/406.72
  6. Step 6: Final answer
    x = 545.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.