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Finding the Fourth Proportional to 404.94, 607.63 and 313.81

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Solution

The fourth proportional to 404.94, 607.63 and 313.81 is: 470.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.94 : 607.63 = 313.81 : x
  2. Step 2: Convert to fraction form
    404.94/607.63 = 313.81/x
  3. Step 3: Cross multiply
    404.94x = 607.63 × 313.81
  4. Step 4: Simplify right side
    404.94x = 190,680.37
  5. Step 5: Solve for x
    x = 190,680.37/404.94
  6. Step 6: Final answer
    x = 470.89

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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.