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Finding the Fourth Proportional to 406.02, 609.12 and 313.77

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Solution

The fourth proportional to 406.02, 609.12 and 313.77 is: 470.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.02 : 609.12 = 313.77 : x
  2. Step 2: Convert to fraction form
    406.02/609.12 = 313.77/x
  3. Step 3: Cross multiply
    406.02x = 609.12 × 313.77
  4. Step 4: Simplify right side
    406.02x = 191,123.58
  5. Step 5: Solve for x
    x = 191,123.58/406.02
  6. Step 6: Final answer
    x = 470.72

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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.